Review on NEWMARK MengChen Protective Protection Particles by Ron Patel

Although I have no way of testing effectiveness, the masks proved to be a good fit. Came in a box of twenty individually wrapped (2 of each) with a certificate / expiry date (two years). The mask is comfortable to wear, soft, not blown from the top, bottom or side. The nose bridge is solid and the hinges are good quality, no holes like some other brands on the bracket. Recommended as a substitute for cotton as it does not heat up and retains too much moisture.