Product Info: Material: electrostatic filter cotton Features: Professional protective mask, filter rate of PM 2.5 ≥95% for non-oily particles, in line with the product's standard electrostatic filtering technology, high filtering efficiency, low resistance, more comfortable 3D three-dimensional cutting, tight fit, more comfortable and adjustable wearing Nose clip, fixed on both sides of the easy-to-loose nose wings, suitable strength, ensure good adhesion, isolated from polluted air, ear strap design helps to achieve a good sealing effect, easy to wear and remove KN95 level breathable sunscreen, anti-haze and industrial dust Anti-flu earband type breathing valve mask