. The versatile Discovery 60 Crown Waxless NIS Skis provide a winning combination of kick and glide, in and out of the tracks. The durable wood core provides lightweight performance, while the Ultra Tuning Base offers superior control.. . Lightweight wood core. Ultra Tuning base. Rental Tail Protector . 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..