Maintenance-free. At 9.5 in. (240mm) can withstand up to 1700°F (927°C) in radiant heat. Twin filters for easier breathing. Hood is a clear material. High visibility reflective strips for easy recognition. Highest level of protection maintained by silicone neck dam. Protects lungs, head, eyes, and face. Can be used with eyeglasses, beards, and long hair. Packaged in puncture- and- water-proof laminate barrier. One universal size. Certified Model ASTM E2952 – INCLUDES POUCH