The giro sonnet womens road bike helmet is a favourite in the womenrsquos 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 this giro womens helmet features a light weight and durability in mold construction that wonrsquot weigh you down giro sonnet womens road bike helmet