Sport-Tek® PosiCharge® Competitor? Headband. STA35. Top off our other PosiCharge Competitor styles with this moisture-wicking headband that narrows in the back to fit more securely. Single-needle top-stitched edging. Fabric: 3.8-ounce, 100% polyester interlock with PosiCharge technology Features: Removable tag for comfort and relabeling