The extremely lightweight 6000 series full face masks feature a wide field of vision, and low maintenance design for maximum comfort and simplicity of use. Extremely lightweight - 450gms (without filters), Wide field of vision, Polycarbonate lens is impact resistant to EN166:B, 3M Cool Flow Valve allows exhaled air to escape quickly and easily for improved wearer comfort, Soft, hypo-allergenic elastomeric face piece, Four strap suspension, easy to put on and take off, Speech transmission zone, Unique 3M bayonet filter fixing system, Standard: EN136