100 cal/cm2 ATPV ratings Made from TuffWeld and Q/9® material layers 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 Khaki VLT = 26% NFPA 70E does not have a Hazard Risk Category above 40 cal/cm2. Working on levels above 40 cal/cm2 should be avoided because of the blast hazards caused by arc flash.