The Connelly Concept is the most forgiving high performance slalom ski on the water. The perfect combination of a high-end dual concave tunnel design, aggressive sidecut, and a soft flex pattern makes the Concept ideal for a variety of skiers. The Concept is the definition of smoothness and consistency. The nice, big sweet spot and round bevels make edge transition smooth and forgiving. CAPT fiberglass construction. Adjustable Slider fin with foil. The Sidewinder brings Hinge Tech to the masses with the first and only step-in waterski binding at a value price. Pull the lever down, and step into the binding effortlessly. Pull the lever up, and feel the zero heel lift. Lycra lined heel and toe hold your foot snug and secure. Sidewinder Boot sizes: XS(4-5), S(5-7), M(8-9), L(10-11), XL(12-13), 2XL(13-14).