Tough and durable: PVC & foam material is safely and helpful to decrease the impact forces of the collision.Comfortable: The special aerodynamic design that makes air ventilated can keep cool during riding a bike.Lightweight: 130g super lightweight helmet will not cause any burden to the rider's head during cycling.ADJUSTABLE DIAL & STRAPS - The adjustable fit system for men and women.Color: Blue* This bicycle helmet uses a quick-release buckle that is simple and can be buckled and unbuckled without change the adjustment. * The special aerodynamic design that makes air ventilated can keep cool during riding a bike. * This helmet is made of PVC & foam material, with CPSC Certified, is a lightweight and high quality helmet. * Adjustable strap can meet the satisfactions of most cycling riders.