Titin Short Sleeve Pocket Shirt Make workouts more challenging, tone muscles, and build strength with the Titin Pocketed T-Shirt. This training t-shirt features 14 pockets that are designed to hold Titin gel weights (sold separately). Smooth performance zipper on the back makes it easy to put on or take off. A.M.Y. antimicrobial material blocks odor and germs caused from sweat. Does not include gel weights. 52% A.M.Y./48% Polyester. Imported.