The Kemp USA Water Aerobic Belt unlike others is manufactured out of special EVA foam designed to withstand chlorinated water. Reinforced nylon belt attachments with plastic couplings, so as not to wear out. This belt is specially contoured to fit below the ribcage and above the hips for easy motion and breathing. Provides lumbar support and vertical balance. Newly designed belt is slim enough to keep you afloat without hampering arm movement, while engaging the core muscles due to its unique shape. Color-coded by size for ease of finding your belt size during water aerobics classes.