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.

Yes, :dc Microparticle Stopper masks have passed the 8 tests of CNS15980 for PM2.5 mask A-level protection in Taiwan. This specification is equivalent to masks above N95.

 :dc Microparticle Stopper masks also passed the GB/T 32610 A-level protection and KN95 certification in China, and the KF94 certification in South Korea.

In addition, :dc Microparticle Stopper masks have passed various Lab tests in United States and Japan.

For a complete list of tests, please refer to https://www.dctpro.com/tw/test_reports.php

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 .

In general, we recommend rinse with water, or spray with 75% - 95% alcohol to air dry overnight.

For high concentrations of oil smoke environment, we recommend soaking the mask with diluted dish soap for 30 to 60 seconds. Please avoid rubbing to prevent damages. For more information, please refer to https://youtu.be/pQKAlvB1c3g

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.

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.

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 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

:dc Microparticle Stopper Fitted Flat Masks have the maximum coverage area of 180 mm x 60 mm.

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

The curvilinear design of the :dc Microparticle Stopper 3D mask  is made to fit most people.  To further reduce the gaps, nose gaskets and ear buckles are available for purchase.

Each box of the :dc Microparticle Stopper masks has a unique serial number. The QR code on the packaging contains the product pedigree.

Each batch of filter materials for :dc Microparticle Stopper masks is tested by certified third party labs , and only certified materials are made into masks.

Please scan the QR Code to learn more about the quality documentations.
 

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.

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