DON'T TAKE OUR WORD FOR IT Internal testing by the German Triathlon Federation (DTU) shows that this is the fastest swimming tri suit they've ever tested. Then Castelli adds the aero speed on the bike and run. You'll get to the finish line faster. The secret is in Castelli's unique engineered...

Designed for use over our suit in non-wetsuit races, the Castelli Elite Swim Skin creates a comfortable, nearly seamless swim skin to help us reach maximum water speed. It features Castelli's engineered stretch woven fabric, woven-in leg grippers, and a water-repellent finish, while the necessary...

Evolution of the record-breaking PR Speed Suit. Premio-based short portion for exceptional comfort and improved aerodynamics, especially in crosswind conditions. CFD and in-depth wind tunnel testing create the fastest triathlon racing suit, optimized for high speeds. When starting from a suit...

Built for 70. 3 and full-distance racing, Castelli's Sanremo Ultra Speedsuit provides long-lasting comfort and superior aerodynamics. Its main body fabric provides a snug fit and moisture management, while the rear Velocity mesh keeps things breathable while blocking our 94% of harmful UV rays....