Yes, :dc 3D Mask has certify by varios national strandard 

Taiwan : PM2.5 mask CNS 15980  A class (passed 8 major test items.) 

China: GB/T 32610 A  grade PM 2.5 mask

China: KN95 mask certificated 

Korea KF94 mask certificated

:dc mask also done many tests in USA, Japan, China and Taiwan NCTU Lab,  please refer  https://www.dctpro.com/en/test_reports.php for all our test reports.

Medical mask only filter particle bigger then PM3, However the particle smaller then PM2.5 will effect our healthy. 
dc mask would block PM0.075 for 99%, to provide you best protection.

The N95 and R95 or P95 nomenclature originate from the National Institute for Occupational Safety and Health. The N95 stands for filter at least 95% of airborne particles, Not resistant to oil. 

There are two designations for oily-based particle disposable respirators - R95 and P95. The “R” rating is said to be “somewhat resistant to oil”. The “P” rating is said to be “strongly resistant to oil”. Some oily particles include exhaust from the vehicles, factory emission or, kitchen, etc.

:dc Microparticle Stopper masks are N95 and beyond. In addition to protecting “non-”oily particles, :dc Microparticle Stopper masks can effectively block 98% of “oily particles”. :dc Microparticle Stopper masks are of P95 specification and is a full range of protection.

We recommend daily hand wash with

Flat mask  maximum of 2-3 days.   
Fitted Flat mask  maximum of 3-4 days.   
3D mask maximum of 5-7 days. 

Tested by Taiwan Textile Research Institute (TTRI), :dc Microparticle Stopper masks still hold the same 99% filtration efficiency after 5 washes .

Please use clean water to clean the mask, If the mask is used in a heavily polluted environment, please use warm water (approximately 50°C) with mild washing-up detergent to clean the mask, and don’t twist the mask. 

For flu disinfection, please clean the mask by gently rubbing it in 75% / 95% alcohol or SIM water. 

How to wash the mask, please refer to  video  https://youtu.be/II2Z9RooILo

No,  the gray color of the fabrics is simply a style choice. Our gray fabrics do not fade without going through the post-processing dyeing. Furthermore, our fabrics have passed the AZO Test as ”Not Detected" by Taiwan Textile Research Institute (TTRI).

We are currently unable to source Medical Activated Carbon materials to meet our safety and filtration efficiency standards.

They are using the same grade of  :dc Microparticle Stopper filter material.  

The 3D Masks are designed to allow a spacious air chamber and they are our most comfortable style thus far.

The Fitted Flat masks are an updated version of the Flat masks. Fitted Flat masks reduce the gaps and increase the fit and comfort level.

To learn more, please see our videos

- :dc Microparticle Stopper 3D Mask : https://youtu.be/TUAnhLKeRl4
- :dc Microparticle Stopper Fitted Flat Mask: https://youtu.be/2ON8iSWMA2o
- :dc Microparticle Stopper Flat Mask:  https://youtu.be/lP-afyIHvQA

The second-hand smoke are composed of “Aerosol” and ”Gas”. :dc Microparticle Stopper masks efficiently block harmful aerogel particles such as nicotine and tar. :dc Microparticle Stopper masks are breathable and blocks approximately 50% of the smell.

The QR code can show you quality and production tracking history of the masks contained in the package box. Each pack of the mask has a specific serial number for quality and production history tracking. All the films are tested and certificated by independent 3rd party to ensure the quality before they are made into masks. You can check the production history and test report online by scanning the QR code.

:dc Mask has consider ergonomics into our design, that :dc mask fit most of people ‘s face, however if you would like to enhance the fitness more, you could take our mask accessories set to enhance the fitness.

We recommend choosing your masks based on your shirt size.  If you wear size S and M or have a smaller face, please choose size M.  If you wear size L and XL, choose size L.  Size S masks are for children up to 3rd grade.

-3D Mask Adult XL:  153 mm  ( open to 200 mm) x 140 mm

3D Mask Adult L:  150 mm  ( open to 180 mm) x 125 mm

-3D Mask Adult M:  140 mm (open to 170 mm) x 115 mm

-3D Mask Child S:  120 mm (open to 150 mm) x 95 mm

We do not offer exchange or return once the safety seal is broken.  Please choose your size carefully.