Rave Sports Springless Bongo Bouncer - 15'The Bongo 15 is the perfect choice for families looking for minimal set up, portability and a great all around recreational swim platform. The bounce surface is connected directly to the inflatable tube without metal springs so it will last in both fresh water and salt water. Bongos should not be confused with their water trampoline cousin the Aqua Jump because they do not have springs. Offered in 4 sizes from 10, 13, 15 and 20 foot options! Easy Set