Sport-Tek PosiCharge RacerMesh Long Sleeve Tee. ST340LSAn unbeatable alternative to a jersey or interlock tee, our value-priced RacerMesh Tee will win you over with subtle mesh texture, moisture-wicking performance and color-preserving PosiCharge technology. Thanks to our ultra-fine flat back RacerMesh, this tee has unparalleled breathability., 3.8-ounce, 100% polyester flat back mesh with PosiCharge technology, Tag-free label, Set-in sleeves, Given the extreme heat required for sublimation, please consult with your decorator. It is highly recommended to sample test product by color before production.