Giro's Sonnet is the perfect choice for all of your rides. It feature's Giro's In-Mold polycarbonate shell for lightness and durability. And it has 25 vents with Giro's Wind Tunnel technology to pull air through the helmet to keep you comfortable. You'll also love Giro's Roc Loc 5 retention system that secures the Sonnet and lets you achieve the perfect fit.
- Small = 51-55cm
- Medium = 55-59cm
A) Micro Dial - A ratcheting dial that’s simply twisted to tighten and loosen the fit.
B) Three-Position Vertical Fit - Lets you raise and lower the Roc Loc system to the perfect position.
C) Ergonomic Arms - Minimal shape fits comfortably and accommodates eyewear.
D) Dual Pods – Supportive, minimal panels that cradle your head for the utmost in comfort and safety.
E) Strap Management - The straps (not shown) are woven through the fit system to always remain in the right place.
In-Mold construction process
Wind Tunnel ventilation system
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