The product is made high-quality and density avirulent environmental high protection material. PVC & PC, EPS foam material is safely and helpful to decrease the impact forces of the collision. Adjustable straps and CPSC Certified can protect your head, which meets the satisfactions of most cycling riders. The special aerodynamic design that makes air ventilated can keep cool during riding a bike. Super lightweight helmet will not cause any burden to the rider's head during cycling. It can be used as suitable for riding, running, skiing and other outdoor activities. 11'Lx8 1/4'Wx5 7/8'H