This ski package is great for the novice cross country skier who focuses on groomed tracks. The lightweight Wood Air Core provides support and propulsion, while the Double Cut Base offers low maintenance fair gliding properties.. . Cross Country. Wood Air Core. Touring Auto Combo Bindings. This Binding Only Accepts an NNN Boot. Skis and bindings are shipped unmounted and unadjusted. Skis, boots and bindings including track mounted bindings must be installed, adjusted and tested as a complete system by a qualified ski technician prior to use. Please contact our Customer Service Department at 888.463.6367 for help locating one of our stores that can perform the mounting service. .