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 and for comfort and breathability. The 100 percent synthetic polypropylene means superior filtration and breathability as well as latex-free construction. One size fits all. Elastic spandex head and neck straps help maintain maximum facial fit and 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 and 4.25" front edge-to-side.