Your equipment needs to work as hard as you do, and Castelli's Core Tri Suit will help you put it all on the line. The upper features Tempo Light fabric for lightweight breathability, and Pace 3 fabric legs offer muscular support and reduced fatigue over long distances. The half-length zipper lets you easily cool down. Lie-flat leg elastic and flat stitching around the arm holes eliminate chafing and hold this tri suit in place while you're out on course. Plus, a capacious aero pocket in the rear holds all of your nutritional needs.