Sport-Tek® Ladies Embossed PosiCharge® Tough Polo?. LST630. Tough enough to conquer moisture, snags and color bleed, this smooth polo also features a subtle, allover embossed geometric pattern. 4.7-ounce, 100% polyester jersey with PosiCharge technology Gently contoured silhouette Self-fabric collar Tag-free label 1-button Y-placket with dyed-to-match rubber button Set-in, open hem sleeves