Indiana Face Mask N95 Respirators offer five layers of protection with ample room to breathe. They meet NIOSH filtration requirements, filtering at least 95 percent of non-oil based airborne particles. Five layers of protection include three electrostatically charged, inner filtering layers made of melt-blown, nonwoven polypropylene for micron filtration. Outer layers are made of spunbound polypropylene to filter large particles & for comfort & breathability. The 100 percent synthetic polypropylene means superior filtration & breathability as well as latex-free construction. One size fits all. Elastic spandex head & neck straps help maintain maximum facial fit & seal. Use with or without glasses thanks to the adjustable nose clip made of polyethylene-coated double wire. Masks are individually wrapped. Facial cup measures 5-3/4" side-to-side, 6.125" top-to-bottom & 4.25" front edge-to-side.