The Baker Hard Hat 13/14 Helmet from Bern Weight:18.5 oz Standards:ABS Shell with Brock Foam Sizing: Small 54-55.5cm, Medium 55.5-57cm, Large 57-59cm, XL 59-60.5cm, XXL 60.5-62cm Liner: Hard Hat Go All Season: Yes An ABS shell aligned with soft moisture wicking Brock foam for a multo-impact All Season lid. (Hard Hats are designed for multiple lower force impacts & do not meet the standards for action sport head protection.) The Baker is the original Bern visor lid. (Patent US D572, 865 S) Two-time Olympic Gold medalist Seth Wescott introduced the Baker to the world at the 2006 Olympic Games in Torino. Bern created the most stylish helmet in the game. I have had a pro-model in the Baker for four years because it fits & looks better than any of the (others). Seth Wescott