3M™ Cool Flow™ Exhalation Valve is a patented one-way valve offering easy exhalation for cool, dry comfort. Cake-resistant filter media Lightweight construction contributes to increased wear time. Buckle adjustable straps provide a comfortable, secure fit with a single tug. Welding web is a unique filter media and protective layers are designed to be flame resistant as demonstrated per ASTM D2859.96. (Not a substitute for a faceshield) Adjustable noseclip provides a custom fit, secure seal, and reduces the potential for eyewear fogging. Faceseal is comfortable to wear and contours easily to help provide a good seal Testing and Approvals: Meets NIOSH 42 CFR 84 N95 requirements. TC-84A-0454