Internal testing by the German Triathlon Federation (DTU) shows that this is the fastest swimming tri suit theyve ever tested. Then Castelli adds the aero speed on the bike and run. Youll get to the finish line faster.The secret is in Castellis unique engineered stretch woven fabric. Rather than stitching together different fabrics for different functions, we actually change the texture and performance of the fabric in the areas where it needs to perform different functions. This is most evident at the leg opening, where a gripper elastic is woven into the inside of the fabric to hold the leg in place, while the rest of the leg is smooth for speed in the water. This technique allows the lower portion of the suit to be made from a single piece of fabric. And the suit tests fast in the wind tunnel on the bike as well.|But the DTU also wanted extra cooling on the upper body for the run, so theres a different fabric on the chest that stays cooler and wicks away moisture.Features:- Fastest suit for sprint and Olympic-distance racing- Engineered stretch woven fabric with woven-in leg grippers allows nearly seamless construction for maximum speed in the water- Polyester mesh stretch woven fabric over chest for better breathability on bike and run- Necessary seams are bonded rather than stitched to lie flat- Bonded internal 2nd layer modesty panels at critical points- Open back construction- Saddle liner for on-bike comfort- Water-repellent finish for maximum swim speedSpecifications:- Weight: 219gTechnology:Rosso Corsa:- Our Rosso Corsa label is only applied to the highest-level products we make. Every thread and fiber, every curve and contour is obsessed about. Rosso Corsa represents a categorical breakthrough in cycling innovation and the meticulous craftsmanship you expect from Castelli's performance-enhancing apparel.