Meets ANSI/ISEA Z89.1 Type 1 and CSA Z94.1 Type 1 requirements. Fulfills Class E Electrical Insulation requirements. Lightweight shell made with UV stabilized HDPE. 4-Point quick release suspension with strong textile straps and crown comfort pad. SURE LOCK wheel adjustment system. Low nape strap. Non-chaffing, replaceable foam sweatband. Universal accessory slots accommodate a variety of eye, face and hearing protection products. Complies with ANSI, CSA, ISEA. 12.5" D x 6.25" H