Deluxed vented hard hat meets ANSI requirement for Reverse Donning and Lower Temperature High-Density Polyethylene (HDPE) shell designed with five raised channels for strength, and a longer back. For extra protection Evolution Wheel Ratchet is easy to use and creates a firm comfortable fit. Meets ANSI/ISEA Z89.1-2009 standard for Type I. Chamlon™ sweatband Universal slots to fit various accessories Wide polyester textile webbing harness Vented hard hat versions have a Class C (Conductive) electrical rating.