Folding Contour Fit Protection Protect against airosols 10 PK Three layers of protectoin, with nose piece, has the capabilities to remove up to 95% of airosols from the air. This will keep you from processing microns in the air from activities like sanding, grinding, sawing and insulating, as well as cutting down up to 95% of airborne particles. Approved for efficiency of 95%. Double head straps and nose clip will allow for a secure and customized fit. Protection Particulate filter (95% filter efficiency level) effective against airosols.