Never before has technology this advanced been brought to the masses. New for 2015, the Camber utilizes ultra-light In-Mold construction to minimize mass & maximize ventilation without sacrificing one ounce of protection or style. Helmet Features Ultra-light in-mold construction Airevac 2 ventilation New adjustable dial fit system (dfs 2) Low-profile regulator adjustable climate control 20 vents X-static performance lining Snapfit sl 2 ear pads Skullcandy® audio compatible (available separately) Helmet sizing: new dial fit system (dfs 2) + small 51-55 cm + medium 55-59 cm + large 59-63 cm + x-large 63-67 cm Certification: astm f 2040, ce en 1077:2007 class b Weight: 16 oz /400 grams