Worn in the tour de france and now available to wind cheating riders everywhere the specialized tt2 helmet is miles ahead of the competition when it comes to aerodynamic drag reduction strategic ventilation and comfortable fit specialized tt2 helmet features complies with one or more of the following safety standards for bicycle helmets cpse snell b9oa ce and asnzs design developed in tandem with wind tunnel testing for a quantifiable reduction in drag 4th dimension cooling