Sport-Tek PosiCharge RacerMesh Raglan Heather Block Polo. ST641This moisture-wicking polo combines solid and matching tonal heather RacerMesh fabrics for a truly modern team look., 3.8-ounce, 100% polyester flat back mesh with PosiCharge technology, Solid flat knit collar, Taped neck, Tag-free label, 3-button placket with dyed-to-match buttons, Heather RacerMesh front and back body, Solid RacerMesh sleeves and placket, Raglan, open hem sleeves