Wing57is the latest Rudy Project Time Trial helmet thats taken aerodynamics to a new level. Co designed by Aerodynamics experts - the wind tunnel guru himself "John Cobb", Rudy went to new levels of design to ensure all the numbers presented where the best of the best. And we have them to prove it. Over a 40km time trial with a power output of 320 watts will be 7 seconds faster then our closest competitor and 30 sec faster then our 4th closest competitor. This is the difference between winning and loosing. For the Fastest & Most aerodynamic Helmet in the world, check out the range. Two sizes, 54-58cm weighing 320g and Large 59-61cm weighing.