Sport-Tek PosiCharge Competitor Short. ST355 100% Polyester Drawstring closure A lightweight, unlined, budget-friendly short that wicks away moisture to keep you comfortable. PosiCharge technology helps colors and logos stay vibrant longer. 3.8-ounce, 100% polyester interlock with PosiCharge technology Removable tag for comfort and relabeling Elastic waistband Continuous loop drawcord