Giro Sonnet Women's Road Bicycle Helmet. The Sonnet is a favorite in Giro's Women's Series collection as it delivers acclaimed fit and performance with unmatched value. The Bicycle Helmet's In Mold construction with 25 Wind Tunnel vents makes the Sonnet lighter, more durable, and better ventilated than most helmets on the market while CoolMax pads absorb excess moisture to keep your head cool and composed. Giro's best retention system the Roc Loc 5 provides quick and easy adjustments to dial in the perfect fit.
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