Valved for easier breathing Protects against fine dusts, mists & metal fumes e.g. chromium dust, nickel dust, cadmium dust, rock wool, glass fibre, mineral wool fibre, cotton, silica, welding fumes NPF 50 x OEL APF 20 x OEL EN149:2001 Each mask is hygienically packed in a sealed polybag with User Information 10 Pack