The Tube-O-Line inner tube was designed to chill and thrill. Chill with friends and family tube style on the lake or river. Flip it over and it's a mini-trampoline! A perfect match with our Base Camp Dock or Runway Dock using the ISLE-LINK system to create a mini-waterpark (at the lake or pool) for the kids. Or just use it by itself as a mini-trampoline by the pool or in the yard. Made with incredibly durable 0.9mm PVC with welded seams for years of play.