Recommended for nuisance level organic vapor relief. 3M™ Cool Flow™ Exhalation Valve is a patented one-way valve offering easy exhalation for cool, dry comfort . M-noseclip adjusts easily with fewer pressure points and greater comfort, reduces the potential for eyewear fogging. Lightweight construction contributes to increased wear time. Braided straps provide comfort and durability Testing and Approvals: Meets NIOSH 42 CFR 84 P95 requirements. TC-84A-1166