The BiotechInnova TechnoWeb N95 Surgical Mask is complete protection from all infectious liquids. This mask is certified by the FDA and is a Class 2 Medical Device High performance Medical grade N95-510K It offers perfect seal Medically equivalent to the respiratory mask Also Adjustable strap for ultra comfort Nano technology .1um with greater breathability 3d Design wraps your chin and nose with no gaps Made in South Korea and cleared for medical rooms 510K Certified