A TAILORED APPROACH TO AERODYNAMICS.The foundation of aerodynamics is pure and unyielding every bit of drag devours time and calories. And as speed increases, so does the airs appetite. Instead of simply facing this challenge head on, the Selector gives you a new edge in the race of truththe tail. By combining a smooth front profile with either of two different lower tails, riders can optimize their helmet for best aerodynamics based on their anatomy, riding position and even course conditions. The result is a helmet that works for you like no other helmet can when every split second counts.