Pro-Hood Arc Flash Protection Hood. 4 0 cal/cm2 ATPV ratings. 40 cal/cm2 hoods are made from arc flash resistant material. Sewn with Nomex® thread. Arc rated 10 x 20 anti-fogging replaceable lens. Slotted bracket. Hook and pile tabs to attach Salisbury's PRO-AIR belt mounted compact air system. One size fits all. Hard hat not included. Meet current ASTM F2178 and NFPA 70E standards and the flammability requirements for ASTM F1506. Includes Integrated Air system.