Pearl Izumi's P. R. O. In R Cool Tri Singlet cools your core and supports your muscles so that all your hard training pays off come race day. The Tri Singlet was constructed using both Izumi's P. R. O. Aero and Direct Vent fabrics. Starting with the former, the singlet used a knit surface area that facilitates the wicking and evaporation of moisture. And, in addition to this, the material's Minerale treatment utilizes natural volcanic minerals in order to accelerate evaporative cooling, while also providing odor reduction and UV protection. On top of that, Pearl Izumi's In R Cool technology reflects the sun's rays, effectively lowering the surface temperature of the fabric. In fact, Pearl Izumi claims that this treatment lowers the surface temperature of the fabric by up to 35 degrees Fahrenheit in direct sunlight. Those benefits are bolstered by the Direct Vent side panels providing an ample airflow through the jersey. This permits plenty of air flow to enhance fabric and skin drying, and to reduce drag over you, Pearl's P. R. O. Aero fabric smooths turbulent air. Two back pockets are also streamlined for an even lower drag value, and they've also been positioned for easy access during the run and in the saddle. Pearl Izumi includes a laundry bag with the P. R. O. In R Cool Tri Singlet, and does not recommend using it in chlorinated pools. It comes in four sizes from Small to X Large and in the color Black.