Leave them in your wake with Castelli’s Free Donna Tri ITU Suit. Cut from Castelli's Hydrophobic Instadry Speed Fabric so you slip through water and wind with minimal moisture absorption, this suit also sports a Velocity mesh back that's wind-tunnel tested for faster bike splits. A Kiss Tri chamois yields lasting support on the bike while remaining virtually unnoticed during the swim and run—the chamois is tailored just right so no extra padding gets in the way. Minimalist pockets let you store food and extra clothing, yet remain hydro and aerodynamic. With an ITU-compliant rear zip, this one-piece suit features no-sew under-arm construction to eliminate chafing, plus skin-nurturing Giro3 arm and leg grippers to keep the suit locked in place.