Hand Wash,Comfortable breathing,Wider face coverage for maximum protection,Discards exhald air and heat build up Innovative 2-panel design for universal fit,Flawless construction,Engineered 7 layer particle filteration, Minimal eyewear fogging, Adjustable nose clip for enhanced protection, Adjustable earloops, Contour fitting design 99.8% Bacterial Filteration efficiency(BFE) for over 3um(micron)sized bacteria. Splash Resistance which protects against accidental fluid/sneeze droplets from reaching user's nose or mouth. Material used in Filtration Process- Outer 3 Layer - Air Mesh, Middle 3 Layer - Spun Bond Meltblown Spun Bond, Inner 1 Layer - 100% Cotton Reusable,Washable that is cost effective. Large Size - 70 Kgs and above.Medium Size - Less than 70 Kgs