Material : BIOSHIELD 75TM Special coated non-woven fabric, special filter for N95 CLASS(for preventing yellow dust and fine dust) Feature 1: BIOSHIELD 75TM Special coated ; Search for BIOSHIELD 75 in the Google search bar for information of Bioshield 75 ,anti-virus Feature 2: Special filter for N95 CLASS N95 CLASS FILTER : Professional filter for filtering particulate matter including viruses and bacteria according to the (NIOSH)National Institute of Occupational Safety and Health, filter efficiency of 95%, equivalent to KF94 yellow sand and fine dust filtration filter indicated by the Korean Food and Drug Administration. Feature 3: Excellent elasticity by using high elastic band Built-in fixed(wire frame) core of the nose prevents fogging and dripping during breathing and makes the face comfortable with a three-dimensional wrinkle design of the human body structure NOTE ; Due to current policy of Korean Medical and Health Authority to restrict exporting quality medical mask abroad , the shipping quantity per order is limited , within 30,000 per order. and the split orders are required to be made successively for larger quantity