Designed with Pearl's P. R. O. Transfer Aero and In R Cool fabrics, the Pearl Izumi Women's P. R. O. In R Cool Tri Singlet delivers the best of aerodynamic efficiency and lightweight, moisture wicking comfort. Its Coldblack finish acts much like a lightly colored fabric, reflecting bright UV rays for a cooler, more comfortable feel when you're running and training under the scorching summer sun. Direct Vent back panels channel cooler outside air over your body, preventing overheating and perspiration build up. There's an integrated bra for excellent support when you're running and racing. Further enhancing comfort levels, its single layer, stitch free armhole and neck provide a smooth, non irritating fit and feel. Moreover, you'll find two rear envelope pockets for easy access to energy gels, small snacks, and even an extra layer or small jacket. Note that Pearl recommends you keep this top out of chlorinated pools, as it may induce fading and premature wear.