Giro Women's Kaya Road Helmet - Performance Exclusive In-Mold construction reinforces the area around the vents and ribs, creating a one-piece exoskeleton, which allows the helmet to be lighter, more durable and better ventilated than traditional designs 20 sweeping vents provide superior ventilation and cooling comfort Acu Dial retention system combines the ease of single-handed adjustment with a full 360 band for a quick and stable fit Certified CPSC Suggested Use: Recreational Road and Trail, Urban/Commute, Touring