The Sonnet is a favorite in Giros 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 impressive 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 weight you down.
In-Mold polycarbonate shell with EPS liner
Roc Loc 5 Fit System - The industry benchmark in comfort, stability, adjustability and weight savings. In addition to enhancing the fit and comfort of helmets, Roc Loc 5 allows you to easily custom tune the fit tension and the fore-aft tilt of the helmet in seconds using a single hand. And it's almost 40% lighter than comparable systems too, making it the ultimate in skull hugging luxury.
25 Wind Tunnel vents with internal channeling - Giro helmets are developed utilizing proprietary Wind Tunnel ventilation system. This elaborate design combines active vents in the helmet's shell with exhaust channels inside the helmet that thrust fresh, cool air over and around the rider's head while forcing heat and stale air out. It's the most effective cooling system available, and a difference you can feel every time you ride.