Your buddy on the road. Available in four sizes and created with our Advanced Rollsys® fit system, we aim to bring you ultimate comfort in a perfectly-fitting helmet. Eighteen cooling inlet and exhaust ventilation holes connected by carefully engineered air channels are designed to draw air from the front to the rear of your head, keeping you cool and ready to perform for the duration of your ride. On rainy days, the Sphere can be combined with the optional Aeroshell to protect you from the elements. More comfort and convenience come with integrated eyewear docking, lightweight and thin straps, reflective stickering and a ponytail friendly rear head basket design.