The Sonnet is a favorite in Giro's Women’s Series collection, offering acclaimed fit and performance for riders who enjoy great routes as much as a swift pace. The slim shape offers great ventilation thanks to 25 Wind Tunnel vents and the comfortable convenience of the adjustable Roc Loc 5 fit system. And with the light weight and durability of In-Mold construction, it won’t weigh you down. Sonnet MIPS models are available with the Multi-Directional Impact Protection System. Giro believes MIPS can redirect energy and provide more protection in certain impacts.