W052. Polartec® Delta Longsleeve - Slate GreyLightweight training longsleeve engineered with Polartec Delta, a cooling fabric that leverages specialized radiators and hydrophobic hydrophilic fibers to increase airflow, regulate drying, and extend the bodys natural heat dissipation during high output training. Raglan sleeves and flatlock construction create an ergonomic, low friction fit that moves cleanly through dynamic ranges of motion. Staggered side splits and a dropped back hem enhance