Silicone facepiece Versatile - use with particulate filters, gas/vapour cartridges, supplied air systems or Powered Air Purifying Respirators (PAPR) Double-flange face seal 3M (TM) Cool Flow (TM) Exhalation Valve helps make breathing easier Speaking diaphragm for easy, clear communications Scratch-resistant polycarbonate lens Six adjustable straps NIOSH approved