Titin Weighted Shirt System Prepare to play at the next level by training with the Titin Weighted T-Shirt System. This training system includes a base-layer t-shirt with 14 pockets, 8 lbs. of gel weights, and a cover t-shirt that ensures a secure fit. The base layer holds the gel weights in strategically placed areas. This allows you to move naturally while increasing the challenge of your workout and toning and strengthening muscles. The cover layer secures the base layer and gel weights to your body so you can perform at the highest level. The back zipper on the cover layer allows you to easily put on or take off the weighted system. The cover-layer t-shirt also features antimicrobial material that blocks odor and germs during intense, sweaty workouts. Base t-shirt: 52% A.M.Y./48% polyester. Cover t-shirt: 87% sorbek/13% LycraŽ. Imported.