Sport-Tek® Tall Long Sleeve PosiCharge® Competitor™ Tee TST350LS. Lightweight, roomy and highly breathable, these moisture-wicking, value-priced tees feature PosiCharge technology to lock in color and prevent logos from fading. 3.8-ounce, 100% polyester interlock with PosiCharge technology. Removable tag for comfort and relabeling. Set-in sleeves