MSA offers choice of two facepieces, the proven Ultra Elite facepiece or the new industrial Advantage 4000 facepiece for the PremAire cadet respirator. Three facepiece sizes (small, medium or large) in either Hycar or silicone rubber. Nosecups are available in two sizes, standard and large. A one-way check valve preventing exhaled air from entering the mask-mounted regulator. A rugged polycarbonate lens with scratch-resistant coating. A mechanical speaking diaphragm for short-range communications. Five adjustable rubber straps for exceptional head comfort, security and safety. Optional heat-resistant Kevlar net-style head harness.