Building off of the versatile Sin 7 design with the added benefit of a lightweight Paulownia woodcore and Rossi's Carbon Alloy Matrix for improved dampening and power, the 98 mm waisted Rossignol Sky 7 HD W Skis are the best choice for skiers that want one ski for powder to moguls. The Sky 7 HD W Skis also benefit from a brand new Air Tip 2.0 design that takes Rossignol s swing weight reducing design to the next level, further integrating the construction into the overall ski design for a beautiful ski with a silky smooth ride.