Meets -ANSI/ISEA Z89.1 Type 1 requirements. Fulfills Class C electrical rating. Vented for maximum air flow. Lightweight shell made with UV stabilized High Density Polyethylene (HDPE) reduces worker fatigue. 4-Point quick release suspension with strong textile straps and crown comfort pad provides a comfortable and secure fit. SURE LOCK wheel adjustment system for one hand size adjustments. Precise height adjustment settings to ensure proper depth. Low nape strap provides a secure fit, allowing the hard hat to stay on your head even when workers are looking down or bending over. Non-chaffing, replaceable foam sweatband for maximum sweat absorption. Universal accessory slots accommodate a variety of eye, face and hearing protection products.