The Black Diamond Half Dome rock climbing helmet has long been a staple for climbers worldwide The simple yet highly effective design and construction make it a easy choice for safety helmets Made with a durable ABS outer shell material for impact protection and EPS impact foam for shock absorbsion this helmets meets climbing safety standards The easily adjustable chin strap and lower profile suspension system with a onehanded fit dial make fitting simple and secure Streamlined lightweight headlamp clips keep your light secure while climbing or on apporach for no worry piece of mind Sizing SM 5058 cm 19723 in ML 5663 cm 2225 in