Sport-Tek PosiCharge Replica Jersey. ST307True athletic-looking jerseys featuring a breathable mesh body and color-locking PosiCharge technology., 3.6-ounce, 100% polyester mesh body with PosiCharge technology, 4.1-ounce, 100% polyester dazzle yoke and sleeves with PosiCharge technology, Removable tag for comfort and relabeling, Crossover rib knit V-neck, Set-in sleeves, Not designed to be worn over pads