Engineered for record-breaking performance, the PR Speed Suit is Castelli’s fastest tri suit, developed with pro athletes and wind-tunnel testing. Its optimized fabrics deliver unmatched aerodynamics on the bike, while the quick-drying, lightweight construction ensures comfort for the run. A tri-specific chamois balances support and freedom of movement, and the long-leg, short-sleeve design maximizes both speed and sun protection. Built for long-course racing when every watt and every second counts.