eight is added to the TITIN Force shirt system using indestructible, hydro-gel inserts. The Force includes 8 pounds of hydro-gel inserts designed to fit securely within the inner-shirt pockets. Flexible gel inserts can be heated or frozen to provide muscle therapy for 30-45 minutes. Even frozen, the gel inserts retain their flexibility. Some customers choose to buy a second set of hydro-gel inserts to keep in a cooler or freezer for post workout recovery. Layered across your upper body’s major muscles, the soft, pliable hydro-gel inserts allow for full mobility during workouts and are an excellent way to “preload” or warm up for a game.