Our N95 Anti-Pollution Masks are designed with multiple layers of non-woven fabrics and an N95 filter layer. The N95 layer effectively filters 99% of bacteria* and 95% of dust and air-borne particles as small as up to 0.3 microns in diameter. These surgical masks are sterilized and rated for the highest level of filtration. They can be worn for long periods of time without discomfort. The high-strength elastic ear loops can withstand reasonable force. We bring to you premium brands like 3M, Overlap, Venus, Magnum etc. which come with highest certification standards.