Mavericks 3 Ski Tube S20 an all mountain system binding that 510029BYA512 an all mountain system binding that automatically adapts to alpine or GripWalk soles for ultimate versatility and connectivity through the ski GORE Topo stretch panels behind the shoulders make restricted movement a thing of the past a tapered design that is thicker in front which makes the tube easier to board from the water and a 3 panel construction that puts the tow attachment at a lower position on the tube resulting in the tube being pulled in an upward direction even from a low tow point The Mavericks are the premium models in our family of deck style tubes