Total Body System (Bell/Fin Color Indicate Resistance Level) - Combining the aquatic bells and fins together will give you a dynamic full body water workout for fitness and conditioning and also a fuller range of motion, stabilization and coordination for injury recovery and rehabilitation. The bells give you a dynamic hi intensity low impact cardiovascular aquatic workout while engaging the upper body, arms and core that strengthens, builds and tones the muscles. The lower body aquatic Fins effectively tone, sculpt and strengthen your core muscles, legs and buttocks. This is must have equipment if your are doing pool workouts.