KN95 mask filter with 5 layer protection is equipped with adjustable aluminum strips on the nose pads ensure a secure closure.
1. The first breathable plastic layer conforms to the contours of the face and blocks larger particles.
2. The second activated carbon filter layer absorb chemical infection in the air.
3. The third meltblown layer helps filter harmful smaller substances like 0.30 micron dust.
4. Fourth meltblown reinforcement layer, enhanced filtration of 0.03 micron PM2.5 particles.
5. Fifth non-woven layer is soft, breathable and skin friendly.
Notice: This link only Filter Pieces, if you need to buy Sport Mask, please visit our shop.