The Radar X-Caliber Combo Water Skis gives you additional surface area under foot that adds stability and keeps the skis riding. The X-Caliber combos are designed with high-end tech for the most efficient sidecut found in two skis. Combo skiing is the cornerstone to a future of enjoyment behind the boat. Making it easy for someone to learn how to ski is the key to them having fun and wanting to come back for more. The Radar X-Caliber Combo Water Skis ensure anyone wanting to strap on a pair of skis and learn how to rip has a blast from the first time they drop into the water.