Particulate Respirator w/HandyStrap[R] Plus nuisance levels of acid gas irritants. R95 oil and non-oil protection. 100% PVC-free. HandyStrap[R] with buckle, allows mask to hang down around the user's neck when not in use. Ventex[R] valve lets the hot air out faster so workers breathe easier and stay cooler. Added sorbent helps filter out nuisance levels of acid gas irritants. Dura-Mes[R] shell resists collapsing in heat and humidity. Meets heat and flame resistance in accordance with ANSI/ISEA 110-2003 Section 7.11.1. Soft foam nose cushion for added comfort.