3M Particulate Respirator 8511, N95 (Pack of 80) NIOSH approved for at least 95 percent filtration efficiency against certain non-oil based particles Braided headbands two-strap design with dual point attachment helps provide a secure seal Adjustable M-noseclip reduces potential for eyewear fogging 3M Cool Flow Exhalation Valve reduces heat build-up inside the respirator Advanced Electret Media is designed for ease of breathing