Sport-Tek Long Sleeve PosiCharge Competitor Tee. ST350LSLightweight, 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 with PosiCharge technology, Removable tag for comfort and relabeling, Set-in sleeves.