The Sphere helmet is your companion on the road. Available in 4 sizes and created with our advanced Rollsys® fit system, our goal is to provide you with maximum comfort in a helmet that fits perfectly. 18 cooling inlets and exhaust vents connected by carefully designed air channels are designed to draw air from the front to the back of your head, keeping you cool and at peak performance for the duration of your ride. On rainy days, the dial can be combined with the Aeroshell available as an accessory to protect you from the elements. Comfort is delivered with in-mold construction and details including goggle attachment. Thinner straps. Reflective stickering. And a ponytail-friendly back design.