Fiberglass and Shredlar (armid fiber) impregnatned with marine vinylester resins. * Certified CE 1385 international standard for headgear for whitewater sports. * Multi-Impact VN foam liner laminated to closed-cell comfort foam. * H.O.G Lock Retention System - fits behind nape of neck for secure custom fit. * Small, Medium and Large fitting pads are included with each helmet.