The Portwest PW50 Safety Helmet is constructed from high-density polypropylene, making it impact-resistant. It features a slip ratchet system and a 4 point adjustable plastic harness with a soft foam sweat band. The helmet is compatible with the PW42 Clip-On Ear Muff and other safety helmet accessories. It also offers electrical insulation up to 1000Vac or 1500Vdc (EN50365) and meets the standards of EN397 and EN 50365.