Pearl Izumi's P.R.O. In-R-Cool Tri Shorts are constructed of lightweight, aerodynamic, friction-reducing Aero fabric to get you to the finish in record time. The Pearl P.R.O. Aero fabric also features In-R-Cool technology to reflect the sun's rays and keep you at your best. You'll enjoy unsurpassed temperature regulation and breathability on even the hottest days, and the Pearl TRI quick-dry chamois ensures you'll be comfortable from the water to the bike. You also get low-profile seams and hems for a smooth, streamlined fit and a small rear pocket for your nutrition.