Ultra lightweight shell made with Polycarbonate / ABS material provides superior protection|4-point quick release suspension with dual position height adjustment ensures a proper fit|Strong double-layer woven nylon straps provide durability and secure fit for all day wear|Inner suspension includes comfortable padding for above the brow line, crown and back of head|Rugged non-slip adjustable SURE-LOCK wheel ratchet ensures proper suspension performance and effortless fit for all head sizes|Universal accessory slots accommodate eye, face and hearing protection|Meets ANSI Z89.1-2014 Type I and CSA Z94.1-15 requirements|Fulfills Class E Electrical Insulation requirements (20,000 volts)