The Skullerz 8971 Class E Full Brim Hard Hat is heavy-duty yet lightweight and comfortable head protection built to protect the top of the head from falling objects or bumping into stationary objects. A padded, moisture-wicking and odor-resistant sweatband and top pad lines the sides, forehead and top interior and is removable for easy replacement. This full brim hard hat provides 360 degrees of protection from sun and rain. This safety helmet fits hat sizes 6.5 to 8 (21 in to 25 in). Customize the size with the easy-to-adjust 4-point premium ratcheting suspension. Simply turn the one-handed adjustment knob to tighten or loosen the fit without having to take the hard hat off. Built with weight distribution in mind, this hard hat's snug fit balances perfectly on the head and doesn't slip off. Style: Full Brim; Material(s): PC ABS; Adjusting Method: Ratchet; Thickness: 5 mm.