2840 Series R95 Particulate Respirators, Half Facepiece, M/LExclusive HandyStrap with buckle, allows mask to hang down around the user's neck when not in use Ventex valve lets the hot air out faster so workers breathe easier and stay cooler R95 protection against both oil and non oil based particulate aerosols Added carbon layer helps filter out nuisance levels of ozone organic vapors Soft foam nose cushion for added comfort and no pressure points