Giro Streif Snow Helmet Available in 6 Classic Super Fit sizes: XS(52-53.5cm), S(53.5-55.5cm), M(55.5-57cm), L(57-59cm), XL(59-60.5cm), XXL(60.5-62.5cm) Carbon Construction: Carbon/Kevlar/Fiberglass No Ventilation per FIS Regulations Compliance: CE EN1077/FIS Approved Slalom Chinbar Compatible