After spending countless hours in the wind tunnel at the Polytechnic University of Milan, Castelli has tested and optimized this new Body Paint V TT suit to be the fastest for the widest range of conditions. The real benefits of the suit are felt at speeds above 45 km/h, and the suit is optimized for extreme time trial positions. The fabrics and materials are carefully sourced and placed together to make sure they see the best results in the wind tunnel and on the road.