Aqua Sphere Aqua Gym Starter Kit Starter kit includes one adjustable multifloat ErgoBelt belt, ErgoBells, and a laminated workout guide ErgoBelt provides buoyancy and stability for deep-water running and water aerobics ErgoBells use the continuous resistance of the water to tone, sculpt, and strengthen the chest, shoulders, and arms Waterproof workout guide provides illustrated step-by-step instructions for effective isolated or full body workouts 1-year limited warranty