The tried-and-true construction of our classic Half Dome helmet, now with new low-profile suspension, updated outer shell and secure, streamlined headlamp clips. The Half Dome has long been a staple for climbers worldwide. Now redesigned, the helmet features a new lower profile suspension system with a one-handed dial combined with streamlined headlamp clips for added comfort and simplicity. Finally, an updated chin strap adds more efficiency and security while on the rock. Co-molded EPS foam with low-profile polycarbonate shell Updated, low-profile suspension system Streamlined, lightweight headlamp clips One-handed fit adjustment dial Easily adjustable chin strap Weight : [S/M] 330 g (11.6 oz) [M/L] 350 g (12.3 oz) Size Range : [S/M] 50-58 cm (19.7-23 in) [M/L] 56-63 cm (22-25 in)