Sport-Tek® Ladies Contrast PosiCharge® Tough Polo?. LST620. Smooth, durable and made to perform, this moisture-wicking, snag-resistant polo has earned its tough reputation. 4.7-ounce, 100% polyester jersey with PosiCharge technology Gently contoured silhouette Self-fabric collar Tag-free label Open Y-placket Set-in, open hem sleeves Contrast tech taping at sides