This sterile medical mask has a low-linting polyethylene film outer layer that provides protection from contamination. The inside is made of BICOSOF* fabric which provides comfort to the face. It comes pleat style with earloops. Excellent bacterial and particle filtration combined with good breathability. Material(s): Outer: Polyethylene; Inner: BICOSOF* Fabric; Size Group: 7"; Airborne Contaminant Resistance: Bacteria; Quantity: 200/Box.