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