3M Particulate Respirator w/Odor Filter & Cool Flow Valve Part No. 3M8577 10 per box Ease breathing with the 3M 8577 Cool Flow™ respirator exhalation valve. More breathable for longer-wearing comfort Reduce heat and humidity that makes workers reluctant to wear face masks for an extended time. * Versatile P95 respirator provides 95% efficiency in both oil and non-oil areas * Exceptional filter material enhances comfort and breathability of face masks * Odor-removing carbon layers provide relief from nuisance levels of organic vapors # 3M™ Cool Flow™ exhalation valve makes these respirators comfortable to wear for long periods # M-noseclip and head straps easily adjust for a snug, comfortable fit # NIOSH approved