Durable and flexible elastic ear loop band fits around head and ears securely. One size fits all. Easy to put on and take off. Keep the blue-side outside and the nose clip on the upper side. Adjustable nose strip contour design fits face for a more comfortable fit. Breathable three ply layers. Blue and white outer layers made of non-woven polypropylene materials. Middle layer is made from melt-blown polypropylene materials for mouth and nose protection. These masks should be disposed of after each use. Material(s): Polypropylene; Size Group: One Size Fits All; Airborne Contaminant Resistance: Airborne Germs; Bacteria; Bodily Fluids; Cut Grass; Dust; Pollen; Quantity: 2,500/Carton.