The travel size BOSU?? Sport Balance Trainer is a smaller version of the Home Balance Trainer. It offers the same benefits as the Home Balance Trainer when working on balance, strength or flexibility training, as well as delivers a killer cardio workout. The BOSU?? Sport Balance Trainer is designed with six non-slip feet and meant to withstand normal home gym use. The compact design allows it to serve as your child???s first balance trainer or, if you like to take your fitness on the go, is great for traveling, small spaces or outside workouts.