Skis come out of the mold flat, then tips are bent into place, causing a natural outward pressure. Preloaded tips absorb much of a bumps load before it reaches the sled. While other plastic skis use rigid, bolted-on metal mounting saddles, the patented C & A all-plastic saddle is molded into the ski, allowing the most flex and reverse flex around. Simple 90deg. angles on a square keel and flat-bottom design floats on the snow instead of relying on engineered-in lift the way other skis do. Exclusive ball and cup ski tip loop assembly reduces rigidity and increases tip flexibility. Mounting kit must be purchased separately. Wearbars/runners not included; see RUNNERS section for C & A applications