The Giro Radix bike helmet combines rugged style and durability to meet the demands of mainstream trail riders. * helmet meets EU standard: CE EN1078- meets US CPSC safety standard for bicycle helmets for people aged 5 years and older * in-mold polycarbonate shell with EPS insert * fastening system: Roc Loc® - offers easy adjustment of helmet size in a range of 7 cm using a wheel that gives a sound response when tightening * removable visor * 24 ventilation holes * comfortable inner removable lining that dries quickly * weight approx. 300-316 g * Giro cycling helmet * MTB bicycle helmet * Giro brand helmet * bicycle helmet Giro