NOTES - High quality certified face masks. Please feel free to contact us if you have any questions. Our USA customer service team is ready to help. NOT FOR MEDICAL USE - The disposable masks should only be worn as a precautionary measure as they are not proven to reduce the transmission of any disease. They are not intended for industrial or medical use. WIDELY USE - These adult face masks are suitable for Office, home, salon, cycling, grocery store, doctors' visits and simply general public. It' s a best mask to wear it when you travel through congested airports, bus terminals, malls, party and busy city streets. Keep you from dust, PM 2.5, haze, smoke, automobile exhaust, etc. BREATHABLE AND COMFORTABLE - The Jiehuxi disposable face mask are used for healthcare and general daily use for personal protection. The face mask with adjustable nose clip design for a comfortable fit, one size fits all. 3 LAYERS OF MATERIAL - The facemask is made of 3 layers of high-quality skin-friendly non-woven fabric & meltblown interior filter to last all day. Pack of 50 pcs masks disposable bulk, enough to meet your family /staff /friends' demands. 100% Non Woven Fabric.