High-density polyethylene (HDPE) shell with full brim to protect against sun exposure, rain, snow and dust.,Unique “3D Adjustment” provides a precise helmet fit using harness depth settings.,OneTouch Slip Ratchet adjustment,6-Point Suspension System,Universal slots to fit various accessories,Packed ready-to-wear with no assembly required,Meets ANSI/ISEA Z89.1-2009, Type 1 requirements,Vented hard hat versions have a Class C (Conductive) electrical rating.