I genuinely, need help. I have been trying to fix this for the past 5 days. I've searched in youtube, reddit, and discord to no avail. I've tried all their tips but the game is still in this stupid windows mode. I've tried changing the ini files, making it read-only. Still nothing. I'm honestly getting sick and tired of this but I can't even refund this lame ass game anymore because I've already passed the 2 hours. Please help me.
https://preview.redd.it/sns03qqx4nwc1.png?width=1603&format=png&auto=webp&s=65c37291b2faf8c1c5d3150f97617e25e807f806

This is a fan's labour of love. I wanted to post this yesterday on the occasion of Sachin's 51st birthday, but couldn't find the time to do it.
Anyway, back in 2011, when I was still a massive fan of the man, I spent an obscene number of hours gathering all available footage of Sachin's ODI 100s, edited the clips of him crossing the milestones, compiled a video of all these moments, and posted it on YouTube. I had to split the video in three parts back then because I didn't have permission to post videos longer than 10 minutes.
I know I mentioned that this is a compulation of Sachin celebrating each of his ODI hundreds, but there are a few moments I couldn't include.
Footage of 100s that are missing :

3 - 105 vs West Indies, Jaipur, 1994,

17 - 128 vs Sri Lanka, Colombo, 1998,

18 - 127* vs Zimbabwe, Bulawayo, 1998,

and the infamous

49 - 114 vs Bangladesh, Mirpur, 2011

I am not sure if this post breaks any copyright laws; the videos are still up on my YouTube channel after nearly 13 years.
Here's hoping the mods don't need to remote the post.
Enjoy!

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https://preview.redd.it/kpk20pxzokwc1.png?width=1918&format=png&auto=webp&s=e865241415fd71acbf0d5591d4c4111014c7ed2b

I have a sonic so basically a smaller Cruze I was wondering what mods y’all recommend it’s a 1.8 ls I hope I’m excepted here😂

Hello ,
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This post was ready and supposed to be up over two months ago, but due to the slow shipment of superbuy and waiting to do some fit tests, it was delayed for the actual review.
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Introduction

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A few months back i tried to gather many of the available models and some information for the bracket masks , diving deep into the East Asian mask markets.
Disclaimer: There's a high probability some names of the Asian models of the inner frames been written in a wrong way with the Google translation. There are dozens more that i haven't found. Many of the models are just OEMs , produced for other companies.
The post contains personal opinions that may find disagreements, but we're here for discussing, exchanging opinions and correcting whatever is wrong.
Credits to: u/Jiongtyx for mentioning the Zimi Air late in 2022, u/Covidcautioushuman for helping the community shopping with superbuy and mainly noms780 bringing it back to surface, providing extended details for every Zimi model.
Special thanks to Zhou Liang, the owner of ZiMi Air, that helped me to gather additional info a few weeks before posting this.
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ZiMi Air ZM100 KN100
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The original idea from Japan

Founded in 1907, Shigematsu is considered to be one of the major manufacturers in East Asia. Premium partner at the latest A+A world trade fair in 2023 in a major space , the company provides many unique designs. The Shigematsu DD11 DS2 was invented 20 years ago. This bracket mask has several versions and iterations, including N95 and KN95 models. The company offers good half and full face masks, fit test machines and an interesting respirator in a surgical shape, with a bracket called 'Fine Fit Plus'. The Shigematsu DS2 inner frame still recognized to be one of the best of it's type, with a low breathing resistance, good speech intelligibility and great comfort. The price and it's one size are usually the main drawbacks. This mask type contains a filter with a soft face seal and an inner silicone bracket. Usually, it is suitable for small-medium sized faces (equivalent size ~ ZiMi 7711).
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Pros and Cons of the respirators with inner frames

Every mask shape has it's advantages and disadvantages . This shape with the inner bracket designed to eliminate lens fogging, mask imprints and most importantly to maximize the breathable space. That means, bigger filtering area and lower breathing resistance. The folding designs that include two side hooks on the mask can transform the straps from ear loop to headband and can be adjustable to the proper tightness. The fit, even on the ears, is generally better than other common ear loop respirators used by the public. Therefore, it's usually a significant and comfortable upgrade at the same time. Another benefit is sustainability, as the frame can be reused, the filter life is bigger than 8 hours (14hours officially stated for the Shigematsu) and the cost minimized usually to filter cartridges (ZiMi). Zimi Air newest versions and a few other companies offer the brackets in a hard bendable plastic, while other brands produce transparent silicone. Last but not least, this type of respirator is meant to serve well small heads and fill in the gaps for Asian or kids' faces. The exception again is ZiMi Air, which offers large sizes as well. Sooner or later it will be redesigned for the western communities.
To sum up:
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Pros
● Reduced heat and moisture build-up on glasses or protective eyewear
● Foldable with form resilience
● Structure for air flow and chamber space
● Soft touch, stretchy to a face
● Enhance air tightness around the face
● Sweat adsorption and release
● Easy to realize a successful or failed seal check.
● Easy breathing through the nose, as there's no nose wire closing the nasal passages
● Major upgrade compared to the typical mainstream earloop disposables
● Long lasting filter life
● Suitable for MRI
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Cons
● Price, with only a few exceptions, is usually on the higher side compared to other protective mask shapes.
● While this mask shape ticks all the important boxes (fit, filtration efficiency, breathability), the aesthetics may not be ideal for some face types.
● Most brands are targeted to the East Asian market, therefore it's not an easy task to purchase overseas most of the models through superbuy.
Note: Last months those issues were solved and soon the masks will be sold through well known e-commerce, with international shipping and reasonable timeframes, such as The Face Mask Store and PPEO. The company announced that they will also open an AliExpress shop.
● Similar to quarter elastomerics, bracket masks 'sit' over the chin and below the mouth and some may find this disturbing or uncomfortable. Inner frames are made of hard plastic or silicone. For some faces the pressure on the upper and bottom edge may be unbearable, depending the brand, size and model. Especially, if it doesn't fit.
● The specific shape is designed to fulfill Asian faces in general or S-M sizes, with the exception of ZiMi Air and few other brands which offer several sizes. Even large bracket masks may not offer yet a solution for some high nose bridges and L-XL faces, but these gaps will be solved in the near future, since the company evolves and introduces new updated products.
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The ZiMi Air respirators from Shanghai

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About the company
Shanghai ZiMi Air Purification Technology Co., Ltd., located in the Shanghai Jiao Tong Innovation Park in Sijing Town developed and produced several bracket masks and considered to be the largest manufacturer of inner frames in China.
The platforms for online sales of these types of inner frames are mainly JD.com's system (including JD.com's self-operated, JD.com supermarket and JD.com industrial product channels), taobao and 1688.
In 2017, Zhou Liang, general manager of Shanghai ZiMi Air decided to extend his market reach to "bracket masks" and began to develop the first generation of them. The brand name back then was 'Duoling Air'. In recent years, he started a new business, optimizing and upgrading the second-generation of this folded mask type .
Until 2021, the company has applied for 2 invention patents, for 15 utility model patents and has obtained 7 certificates(applied for 11 appearance patents, and has obtained 11 certificates).
As of today, these numbers have been increased with new generations of Zimi Air masks popping up. That means, 20 invention patents & utility patents that have been infringed, with 5-10 more are being applied for, making them the biggest company of inner frames in China.
The OEM revenue accounted for 95% before 2022 and 23% in 2023. The percentage will further drop, as the company will mainly focus on their brand.
ZiMi Air Headquarters
Why Zimi Air?
While many foldable respirators with inner frames exist in East Asia and around the world, ZiMi Air was picked due the continuous progress of the company making new models, updating the old ones, offering different sizes/grades and adaptability between them, with different filter cartridges. This year, new versions (03) will be available in some models, making them one of the biggest and best company of inner frames. ZiMi Air is only focused and expertised in bracket masks throughout the years, producing the best possible options, combining high filtration efficiency, low breathing resistance and a good seal. Last but not least, the obvious reason was the cheap price and reasonable shipping fees. The Korean, Japanese and European offers may have a potential with interesting models, but the total price was way off to pounce on them. Not to mention, once again, i never got a reply from all of these companies (S.Korea & Japan), trying to source some models and general info. Unfortunately, most of the mask manufacturers are shutting down their businesses or limiting their production and they're very hard to reach.
Purchase links with superbuy are available on this post and from other stores as well, but you can also find them in the wiki. Kindly, have in mind for superbuy:

1. The difficulty processing for first-time buyers.
   
2. The estimated delivery for the cheapest shipping options are slow (20-60 days depending the region). Especially, when choosing the low cost superbuy shipping method for Europe, be prepared for long delays (better estimates for the US). Best options for Europe are usually those that go through Netherlands, but shipping options may be different for different countries. It's better to pick pre-paid custom duties shipping services, but that doesn't guarantee that you won't pay anything extra in customs, unfortunately. At the moment, the best estimates and total prices for Europe come from ppeo, but for single units the only option is superbuy. Soon, the Face Mask Store will list them as well and also an AliExpress ZiMi Air shop will pop up in the future.
   
3. From time to time, some listings are getting out of stock and there is a potential for the Zimi Air products to discontinue models other than M, which according to the company are not that popular. For now, the company is going the opposite direction and will release more sizes.
   

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Purchase through Superbuy or other well-known stores
Until stores that ship internationally (ppeo , the Face Mask Store, AliExpress) starting to sell all of the Zimi models, the only option will generally be superbuy. It's also ideal for purchasing single units. Then, the buyer can purchase filter cartridges from the other stores as well. In the near future, depending the region you live, either one of the 4 options may be cheaper than others.
In the case of superbuy, several excellent domestic Chinese respirators cannot be shipped outside mainland China. The only way is to sign up at www.superbuy.com, to enter all the details and paste the link of the mask for purchase. First, the buyer pays for the product and the domestic shipping. The order is shipped to the Chinese warehouse of superbuy. Then, the products are unpacked , photographed and the buyer is informed that the items have been stored to the warehouse. There's also a section with a dozen of coupons . There are various shipping methods to choose from and after picking the desired service, there's an option to pay the fees. After the payment of the shipping costs , the package is sent to the recipient. This way will help mask enthusiasts overseas to purchase special Chinese respirators and not only bracket masks.
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Models and Sizing
Below are the detailed framing dimensions and the models of each size provided by the company. Detailed dimensions contributed by noms780. More info has provide noms780 here.
The general recommendation in adult sizing is:
- Chin to nose bridge distance 136-150mm: Large size recommended - Chin to nose bridge distance 106-135mm: Medium size recommended
- Chin to nose bridge distance 80-105mm: Small size recommended
ZiMi Air sizing (click to expand)
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Note: Once or twice a year, ZiMi Air produces new sizes, models or cartridges. Therefore this list may change in the future. Also, you have to log-in to superbuy to see the products listed below.
The same sizing details as below are listed on the wiki with superbuy links under the Chinese suppliers, since some models are not visible on the official taobao Zimi store.
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Hands-On
Since i didn't know my sizing, i purchased singles from the ZM9233 (M), ZM100 (L) and black cartridges with valves (x10) from the ZM9541F (M) and ZM8210F (L). The good thing is that different models of the same size fit with the frames of different grades.
The whole product, from the packaging to every little detail, is niche. First thing to notice, there's no typical bad plastic smell, unlikely other masks made in Asia and other parts of the world.
Despite there is a variation in pressure drop among different models, the difference between KN95 and KN100 grades of the models 9541(02) and 9233(02) are not way big. On the other hand, the higher breathing resistance had the ZM100 KN100 (01) , which also had the highest fit factors for my face, but i think there's also a 02 version(it may be more breathable). ZiMi 9233 KN100 version 02 is more breathable compared to 01.
Even though i liked more the 9233 for it's comfort and aesthetics, fit scores were not as good as ZM100, but i did pass the fit test several times. I believe these type of models are for high risk scenarios,for a couple of hours use each time. If you have a large face & wide (like me), in common respirator shapes, the breathable mask area is actual smaller than the whole filter. Going to inner frames, there is a significant difference in terms of fit and comfort. This is finally a well fitted tight respirator that allows you to breathe through your nose.
ZiMi Air 8210F V KN95 on ZM100 frame
Nose foams are installed only in the KN100 versions. Masks and filter cartridges, all have pre-installed strap adjusters, but the default tension may change in the near future, as the company is aware that needs to be revised. In any way, the adjusters are installed, so they're part of the respirator. Therefore, there's no excuse for the wearer not fitting the mask properly, as there's no excuse not forming the nose wire on other masks. Especially these type of products, where the donning procedure is easier than many other disposables.
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To sum-up, here are the main characteristics of ZiMi Air compared to other companies that produce inner frames:
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Pros
- Different sizes with new and updated models each year.
- Lower pressure drop compared to the competitors.
- Price. Japanese, Korean and European models are usually way more expensive and usually not better in performance.
- One of the few brands of this type that offer high performance respirators (KN100) .
- The different colors and the flexibility of cartridges, either black or other colors from Akkair.
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Cons
- Price is higher than other mainstream protective KN95/KN100 respirators.
- Other brands offer mechanism that converts headstraps to earloops, but ZiMi has changed that producing the cartridges with ultrasonic welding, so the buyer has to buy two masks (earloop & headband) instead of one.
ZiMi Air 8210F V KN95 and ZM100 frame
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Fit test results
I performed several quantitative fit tests with a portacount. I tested the medium ZiMi 9233 KN100 (02), the large ZiMi ZM100 KN100 (01), the black filter element 9541F KN95 (02) with valve (headbands) on the 9233 bracket and the black filter element 8210F KN95 with valve on the ZM100 bracket. The model that fits me best is the ZM100 (L). For medium models, i can feel that the fit is not as good as L, even though the tests are not that bad.
Side Note: When breathing through my mouth (deep breathing) and even worse, when talking, i exhale too many particles that inflate my overall scores. This is a pattern with every good mask that i've tried, going from a few hundreds to double digits, esp when talking. For example, Draeger 1920 from 400+ff on average and 40 when talking. I repeated the tests doing silent jaw movement exercises and scores were way better, but i decided to post the exact OSHA protocol with talking for the two KN100s. Scores without talking loud were much higher for the ZM100 and other masks in general, but below are listed the worst tests. For the black KN95 models, i did silent jaw movements, because loud talking messed up everything. Therefore, not only every face fit is unique, but in this particular matter, scores are on the lower side for me when my mouth opened. Your scores may be totally different.
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Here are the results for the ZiMi Air models:
- ZiMi 9233 KN100, ZM100 KN100, black 9541F KN95 (V) headbands installed on the inner frame of 9233, black 8210F KN95 (V) headbands installed on the inner frame of ZM100.

Exercise / Μodel	9233 (02) KN100 (M)	ZM100 KN100 01 (L)	8210F V KN95 (L)	9541F V KN95 (M)
Normal Breathing	362	2596	98	89
Deep breathing	252	555	87	37
Head Side to Side	337	1547	39	75
Head Up and Down	297	1118	139	55
Talking	65	513	57	58
Grimace Excl.	-	-	-	-
Bending over	352	691	82	40
Normal breathing	269	1498	46	49
Overall ff	201	899	66	53

For every single model, the N99 mode is used, which measures particles that get both from the filter and around the mask. Ambient counts from 1500 to 3000 (different days).
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The Chinese market

China has a big variation of brands and models with either unique models or OEMs from other companies. All the potential/suspected rebranded ZiMi models will be mentioned on the descriptions. This list is just a fraction of the total bracket masks, including many discontinued models, since ZiMi had OEMs for more than 20 companies. Unfortunately, with the exception of them, most brands of inner frames in China and other Asian countries have stopped/reduced production and closed factories, as a consequence of the minimum mask demand worldwide.
Here is the CN catalogue that includes the rest of bracket mask family (chances are that many more exist, but either haven't found them or closed their businesses):
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Chaomei (CM) 6007V KN95
Big company with several KN95 / ffp products and many variations. The specific model comes in denim blue or white, with the older GB2626-2006 standard. Discontinued models 4 years now.
Gangkai MG09 KN95
Another reputable company with N95, ffp , P2, DS2 and KN95 (Giko) respirators. They have developed and produced their own bracket .Their mask comes in light blue color.
Siwo Pro7 and medical D920 KN95 respirators
Siwo is very likely the only company that offers the bracket respirators with an external nose wire on their medical, light blue models. The masks contain convertible ear loops to headstraps mechanism and the frame is made by Gangkai. Two models exist, the Pro7 and the medical D920 KN95. Even if Siwo and Gangkai look somehow identical, the filter material of the latter has better filtration efficiency. Children sizes are available for both versions, but tend to fit larger kid sizes.
Ye Dun KN95
This was likely the closest attempt to mimic the Shigematsu prototype idea. Ye Dun is a company that makes plastic molds, therefore the price is cheap, but the filter has high breathing resistance. It failed miserably according to the Chinese feedback i found in some blogs, for it's cheap filter material and the leaky valve. Still, there are people who like the unvalved versions though. The mask offers the hook mod, transforming ear loops to headbands, a cool Japanese-like individual packaging, versions with and without valve and iterations with activated carbon filter. It's probably the cheapest of the whole catalogue, priced at 1.1 yuan during sales.
352 AS 9520/9521 KN95
A Chinese Air Purifier company with very slick machines sold an inner frame model, which will appear in a few more below. It came in white and black. Very cool packaging, but hard to find inside China, as it was discontinued 4 years ago. Similar size to ZiMi 7711 (adult small) like many other models, which corresponds to adult small.Life is playing tricks though and found it in my country out of nowhere with ffp3 certification.
Li Yan KN95
The moment you realize that your search went too far, finding a Chinese taobao store named 'North Korea and United States supplier' ... This looks similar to the 352 AS9520 bracket mask, using a different valve and the older GB2626-2006 standard.
Bestex KN95 with AC filter
Another interesting bracket produced by Ningbo. It offers convertible straps and an AC filter in it. The company also offers surgical face masks and NIOSH respirators and they have produced this inner frame, which is discontinued.
Boluo BL08 KN95
The BL08, that looks similar to the previous Shigematsu version, finds much appreciation on the JD platform. Made in Jiangsu, it's an OEM product that has been discontinued. It features the hook style transformation from earloop to headstraps.
Motlun Electric Blower KN95 respirator
Motlun is another Chinese respirator offering an electronic valve with the mask, but was discontinued 6 years back.
Sumfound F01V KN95
A company that specializes in positive pressure accessories for respirators, offers a bracket mask with valve , several cartridges and other accessories for it's product and for Lifa Air LM99 models. Likely to be manufactured by Ye Dun.
Breazwell Songyan D60 & D65 KN95
Another Chinese brand of inner frames. These OEM models include also an AC filter and adjustable/convertible headstraps.
Akkair KN95 filter cartridges
Akkair is an OEM of ZiMi Air company offering filter cartridges in different colors and patterns. They provide color options for the children brackets and also for the models 7711(S) / 9541(M) / 8210 (L).
Zhende N9501B KN95
A famous Chinese company offers the Zimi Air design. The brand is providing also a children's mask.
Marcio KN95
Marcio, which was generally known for it's cup shape respirators, is using the Zimi 9541 design and the KP95 series in white and black color. Taking it even further, the company is offering the masks with outsourced cool electronic valves.
Zhongtai 9500 KP95 series
A Chinese 007 agent with a tuxedo and a papillion printed on the box? That's some serious marketing for a Zimi Air KP95 iteration with an AC filter.
Yi Ming - One Life Technology
Another Air Purifier company that also sells 3rd party nasal sprays, Fengrui air quality control gadgets(G1) and OEM ZiMi Air masks. If some ZiMi models are out of stock , here's the place to look after for models. Unfortunately, the grey sealing air tight fabric of the KN95 versions has been replaced to a light blue, similar to ZiMi.
Domeair Cooling N95/N95V KN95 respirators
Again, a Zimi Air OEM respirator.
Nuokang KN95 respirators
Company with 18 years of experience in manufacturing masks. Here's an additional Zimi Air series that includes a light blue version for kids.
Duoling Air KN95 and KN100 respirators
This was the first name of Zimi Air back in the day, until 2020 with the models 9550/9540. It carried hooks on the sides that converted the mask from headstrap to earloop.
https://preview.redd.it/d5nnj388hhwc1.jpg?width=3128&format=pjpg&auto=webp&s=74cb70043909b5e5f4c7a68b7fa0bcfe3c1e504c

The Japanese market

Domestic mask market is very straight forward with minimal and good options.
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Shigematsu DD11 DS2
The current generation of the DD11 offers four versions, two with headbands and two ear hooks. Two of them carry valves. Packaging varies for different regions, standards and quantities. In terms of sizing, it's similar to the ZiMi 7711,which corresponds to adult small. (available on Amazon Japan)
Shigematsu 'Fine Fit Plus'
The most interesting design, adapting the surgical shape, adding an inner frame and ear hooks. The 'FFP' comes in two sizes, the adult version(orange packaging) and the small/female alternative(green version). Ideal mask for the general public, upgrading from the flimsy surgical disposables, but not on par with KN95/N95/DS2/ffp2 bracket masks
Trusco DD11-S2
Another reputable Japanese company that uses the OEM design from Shigematsu.
Kanjekanle reusable mask
This Japanese proposal features a liquid silicone frame, medical PP and PE hot melt point isolation layer, cotton insulation cloth coating, a medical breathing valve and medical PE ear hooks. Available in kids mask as well and three different colors.
The Japanese offers

The S.Korean market

South Korea has it's own respirators with inner frames. The shape here is 'fat'. The patent belongs to Evergreen Cleantop, seen also in many other familiar companies to the US buyers, carrying different variations. The models follow the KCs Korean industrial standard (KOSHA), but a few KF94 versions are provided as well.
Most of the bracket masks here offer convertible ear loops to headstraps and can be purchased through Gmarket. Kindly note, the Korean offers have a higher pressure drop than the ZiMi and Shigematsu equivelant options.
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Evergreen Cleantop C600, C700 and C800 KCs / KF94 / KF99 series
Cleantop is the No.1 mask maker in S.Korea that owns the patent of bracket masks and offer respirators in different standards (N95,N99, ffp1, ffp2,ffp, DS2). Several grades, versions with valves and models with activated carbon filters offered in boxes of 10 for the bracket masks.
Dobu N95 / KCs / KF94 500 series
Dobu is another reputable Korean manufacturer that produces inner frames for it's 500 series. It's model on their official website indicates the suitable size.
Geonyoung Cleantech Kanuto KCs
Cleantech should be familiar to buyers from US, for it's KF94 trifolds. Unfortunately, Korean KCs bracket masks didn't find the appreciation they deserved, compared to the less tight fitting earloop KF94s.
Fine Tech KCs series
Another - 'familiar' to the KF94 fans - brand offering bracket masks in several iterations under the KCs standard.
AER(x-DuPont) KA/KX and Q Pro KCs series
Aer is a vehicle filter and mask manufacturer. Their top model is considered to be the KA-130V KCs, which is a dustproof respirator(KCs) and one of the best Korean inner frame. Another interesting bifold comes from the Q Pro line, in different colors and a silicon inner frame.
Respirator Technique (RST) DPF series
Korean safety company that offers the DPF 500 and DPF 700 KCs series. Variations include with valves, small sizes, AC filters and customizable models in different colors/sizes.
Dreamz KCs series
Customized RST respirators in different colors and sizes.
GLS KCs series
Probably the most ugly inner frame due to the placement of the valve. It comes in different grades.
Youngseung YS701A KCs
A respond to the pandemic in 2020 produced this level 1(P2) KCs model. The YS701AC includes an AC filter.
Vavant KCs
Never thought to see a quilted, padded-like material in a respirator, but here we are. Several grades available for this Korean brand.
S.Korean inner frames
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The European offers

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Lifa LM99 and LM95 adults and kids series
Lifa is Finnish Air Purifier company that made several mask brackets for adults and kids, apart from their trifold and bifold ffp respirators in color. Lifa Air is not a pure European company. It is invested and controlled by China's Edifier (speakers). The company buys it's own equipment and produces it by itself . The disadvantage is that the mask is asymmetrical on the left and right, but the performance is ok. Their prices range high, similar to the Shigematsu. Most interesting model is the black LM99D, but they're not praised enough inside China. Sizing is similar to the ZiMi 7711, which corresponds to adult small.
IQ Air ffp2
Swiss company that offers a similar size to ZiMi 7711 bracket mask, which is an adult small. Made in Germany, but the materials and the inner frame are imported from China.
European inner frames
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Other innovative designs with or without the support of an inner / outer frame

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- 'Cup' shapes
The convertible ear loop to headstrap mechanism is also found on several other Asian respirators without inner frames. These masks have the usual inner cell material to keep their cup style in shape without collapsing, with the disadvantage of the added breathing resistance. Here are some interesting examples (more brands and models exist):
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3M 8955J DS2 / 8955K - 8955KA KCs (Japan - S.Korea)
Available in the Japanese and Korean market, the 3M unique design offers convertible ear loop straps. The newest version (8955KA) includes for the first time an inner frame.
Anyguard VC KCs series (S.Korea)
Another well known KF94 brand offering here some serious protection with their VC cup style/foldable models. Produced in Vietnam.
Luna Safety KCs (S.Korea)
An outer frame with an inner filter? This is the Korean proposal that comes in a box of 10 filter with one protective frame.
Moldex (US) , Delta Plus Spidermask (France) , Alpha Solway AMF & Alpha Flow series (Scotland), Era(TR)-JSP(UK)-MFA (TR) -Würth (DE) Flexinet series
Outer frames are common in many regions across the globe. Most brands are offering one piece disposables, some others, like Delta Plus, sell separate the filters and the bracket.
Denpro (N.Ireland)
Denpro is a manufacturer listed onto the NHS Framework Agreement for PPE.As a division of Denroy, one of the world’s leading innovators of high-tech, critical components for the aerospace, medical, defense and automotive industries.
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- Trifolds
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JSP Springfit (UK)
The trifold series from JSP feature a unique endoskeleton structure.
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Respirators with the support of inneouter frame (apart from 3M/Anyguard)
- Duckbills
3M's R&D team had much more inspiration the previous decade.3M Aura Gen2,3M Vflex,3M Aura 9400 premium series,3M 9500KN series,3M Aura Gen3,3M 8862/9062 etc. I can't remember any innovative product in 3M disposable respirators from 2020 until today. The KF94 bifold maybe? That's it.
Here's another unique offer from 3M that took place in Japan the previous decade. The VFlex with a full functional filter area for the wearer:
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3M VFlex 8933 DS2 - discontinued model (Japan)
The 3M respirator with the lowest possible pressure drop (19Pa). The wearer here takes advantage of the whole filter area, making it a pleasant experience. Bonus for the wide adjustable braided straps.
3M 8933 DS2 & flyer (discontinued model)
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- Asian innovative Quarter & half elastomerics
East Asian countries provide some futuristic silicone elastomerics. Models are mentioned for their actual design and not for their unknown functionality.
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Yuan Sentai quarter elastomeric (China)
A discreet design, carrying a pleated filter and offering different colors and sizes. Cheap price at ~8$ for the mask and one filter. A more expensive model from the same company includes electric air supply in several colors. The company should make an upgraded version with bettewider straps though.
Kanshouzhe quarter elastomeric (China)
A dirty cheap fashionable quarter elastomeric in different colors with KN95/KP100 filters. Kids' versions available.
Daierta Silicone outer frame with goggles and filter
This is another great idea for great seal and replaceable filters , with additional eye protection.
Kang Le inner & outer frame with replaceable filters
A rather strange design with two frames and a filter in the middle.
Intelligent electric air purifiers (China)
Many companies provide quarter elastomerics-electric air purifiers in several colors.
Asian Quarter Elastomerics and Intelligent Air Purifiers
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The misinterpretation of the standards

Most of the N95 production is made in China and East Asia in general. Even some companies, with domestic manufacturing in the US and Europe, imported parts and meltblown from East Asia. Same story for Australia, where the majority of P2 respirators are Chinese OEM models.
The big multinational companies, such as 3M and Honeywell, offer the same disposable and half/full face mask models in different parts of the world, with different certifications, owning a very high stake on Chinese sales. The CN companies that produce N95/P2/ffp2 respirators usually sell the same/similar models domestically, under the GB2626-2019 standard or some of them have printed on the masks two or three different certifications. Therefore, there's a big confusion stating that respirators certified as N95/P2/ffp/KF94 are good, KN95s are bad, when the actual meaning is exported ear loop bifolds from 2020 sent outside China.
48 different brands of cup shapes under the GB2626-2019 standard (KN95,KP95,KN100)
This misleading argument followed the Korean standard the recent years, for the fact that most of the certified KF94 respirators are using ear loops. South Korea offers the healthcare 'KF' standard, approved by the Korean MFDS, usually called as 'disease prevention for the general public'. On the other hand, the industrial 'KCs' or KOSHA certification (Korean 1st class KMOEL - 2017-64) is the main standard of personal protective equipment. The KCs mostly includes tight fitting headband respirators and offers three levels of protection in a weird order: level 2 (P1), level 1(P2) and express (P3). The majority of the bracket masks in S.Korea follow the KCs standard, among cup shape and generally 3M ppe. Some of the bracket masks follow the KF94 and the N95 standard.
S.Korean cup shapes under the KCs(KOSHA) standard
When it comes to picking the right protection, the selection ideally should include a mask that fits, in a domestic certification for the buyer. As good as it is the N95/NIOSH certification, with it's strict regulations, the lack of a good standard for the general public and children is missing. The fact that all NIOSH respirators should include headstraps for adult sized faces is not a viable option and will lead again to future shortages and bad imports. The presence of ear loop US made & US certified respirators is something that needs to fill in the gap, so that the North America market won't depend on non-legitimate imports. Canada already owns the CSA standard and China has a mask standard for children since 2020. It's time for other countries to provide new standards for the general public, which may not tolerate headstrap respirators.
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'Unless it's an ffp3...'
The most common misinformation written in the social media among Europeans is that the ffp3 grade is THE appropriate mask for Covid rather than the ffp2. Under the EN149 standard, the acceptable total inward leakage for the ffp3s is from 2% up to 5%. This allows mask manufacturers to make ffp3 respirators with ear loops and ear hooks. A quick search in several selling platforms will show that the most sold ffp3s are usually earloop bifolds across Europe. Not a coincidence that there are more good ffp2 masks than ffp3s.
Still, from time to time, recalled batches are announced for ffp respirators in Europe (small percentage of the production), even for ffp3 models. For that reason, the search should include reputable companies and specific models.
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Better decisions for the general public in the future

Here are some ideas with products for the general public, since it's not a realistic solution to manufacture billions of 3M Auras and train different populations (science fiction scenario).
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Frames for improving the seal of masks
Inner brackets would be a good idea to be part of every available mask type for the general public, from surgical masks to the highest grade respirator.
Here are some cool accessories that can improve the fit of several masks:
● The simple inner bracket for surgical masks.
● Pudun Spectrum Shield: The advanced bracket that's transforming disposables to inner frames. A sustainable solution, making a better fit from cheap bifold masks. The advantage here is the additional breathable space and aesthetics. However, some large masks should be folded properly to fit in. It's an accessory that needs updated versions, to solve fitting problems for the general public.
● Many cheap alternative to 'Fix the Mask' exist in the East Asian Market, but not as good as the US version.
https://preview.redd.it/dclie1509gwc1.jpg?width=2092&format=pjpg&auto=webp&s=2629e23c23aceea93248f942a7244b9696ff3525

Improvements and ideas for disposable products

Here are some ideas for future designs in disposable respirators
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Fit, comfort, aesthetics and breathability in combination with easier donning with new respirators
It's not an easy task to place a trifold respirator with headbands. The 3M Aura is almost an ancient relic, a design from 2011 that fits many different adult faces, but the general public will have a hard time donning it. Same with the Draeger 1900 series. Things got a little better with the Gen3 and the pulling tabs. The only trifold respirator with the fastest donning time is the Norwegian Uniqon, but it was mainly supplied to professionals. The solution is to see new trifold designs from big companies which have the know-how on this area.
Still, inner frames and cup shapes, especially with one continuous strap, have the advantage. The ideal scenario is to invent a mask with the easiest donning in combination with a low pressure drop, long lasting comfort and different sizes.
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Disposables with inner sealing
Cup shapes with an inner gaskets, such as Makrite Envi or 9800 series (or Soft Seal N95) and bifolds with a peripheral PU/silicone foam (Shining Time ffp3, Aer Q Pro) may have better chance of a proper fit .
Inner Elastomeric - Outer replaceable filter. Mu Sheng Tank KN100
Known for it's cup shapes, MST offers a KN100 respirator with an inner elastomeric and an outer replaceable filter under the GB2626-2019 standard.
Three Star Co.,ltd Korean elastomeric
Better looking elastomerics than the 'overkill' options should also be on the list. A - somehow - discreet Korean offer in black and white is showing the way.
Big nose foams should be used in respirators
Fujian Angel Non Woven Fabric Tech Co. Ltd and Ningbo Ciheng Import and Export CO.,ltd provide wholesales for 'Aura-style'. Every company producing new respirators should consider using them or sell them as accessories for modifications. Many masks would benefit of these large foams.
https://preview.redd.it/bcmsd7fx9gwc1.jpg?width=6097&format=pjpg&auto=webp&s=b08b983d0645cb40bb90f1776edc379c5b8f7009

Epilogue

Inner frames are the type of respirators designed to fulfill exceptional comfort and fit, especially for S & M faces, in brands other than ZiMi Air. The latter, with it's continuous progress, has become the biggest brand of this mask type that offers a large variety of models and sizes among many reputable companies, since they're focused and expertise only in one type of model. Bigger companies, with many different departments and type of products, usually don't evolve enough in inner frames, especially now that many factories closed many mask facilities and struggling to stay alive, unfortunately. As Zhou Liang quotes: 'if you try to do everything, you will do nothing well' and that's why ZiMi Air are leading the industry in one type of respirator.
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Thank you for reading my exhaustive posts :) .
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