Curve XS Ski - White XS1604 Blast through the trails in total control. The XS platform from Curve industries offers low steering effort, laser sharp cornering, and increased flotation in all conditions. The XS is the ski of choice for Cains Quest, USCC, and freestyle champions alike. Use with Thrusters to tune cornering, flotation, and maneuverability. Use with the Leading Edge to tune tracking.