The Sphere helmet is your buddy on the road. A four size construction is combined with the Advanced Rollsys system to create a comfortable fit while 18 vents with inlet/outlet construction keep you cooled on every ride. On rainy days the Sphere can be combined with the optional Aeroshell to protect you from the elements. The convenience is delivered with an in-mold construction with details like: eyewear docking, thinner straps, reflective stickering and ponytail friendly back part. Without too many frills the Sphere helmet delivers.