The Giro Prolight redefines the ultra light helmet. This road helmet is very simply and elegantly designed and features the revolutionary new Roc Loc SL retention system. Giro didn't skimp on the vents - 25 Wind Tunnel internally channeled vents keeps air moving around your head for maximum cooling. Other features like X-Static padding and In-Mold construction make the Prolight as comfortable as it is lightweight. 181g.