Honeywell 763000 Survivair Opti-Fit Tactical Mask Facepiece with 5-point Strap, Medium. Superior Field of Vision Offers an unobstructed view in critical situations where line of sight vision is essential Full Facepiece Constructed of soft silicone for excellent comfort, fit, and durability Three-position Canister Mounting Adaptable for various applications Anti-scratch Coated Polycarbonate Lens Virtually free of distortion Lens Meets ANSI Z87.1-1989 (R-1998)2 Standard for impact and penetration resistance DIN-threaded 40 mm Connectors Make attaching and removing canisters quick and easy Low Breathing Resistance.