Experience durability and dependable protection with the full-size Klein Tools safety helmet. Engineered to deliver optimal safety, cool comfort, and modern design. Adjustable vents can be opened or closed to meet personal air circulation needs. The moisture-wicking sweatband and top pad with evaporative technology help keep you cool and comfortable all day. A large ratchet knob allows one-handed size adjustment via a click-fit mechanism. Features front and rear mounts for securely attaching headlamps without straps or ties. Universal side slots accommodate a range of accessories such as hearing protection or face shields.