Energize your classic stride with the race-inspired construction of the Delta Sport R-Skin Stiff classic ski. Designed for fitness-oriented skiers and junior racers, the premium low-density wood core blends a user-friendly flex with responsive..Ldc core: - our exclusive low density core construction features lightweight wood core with air channels for lightweight strength and energy.r-skin tech: - featuring a replaceable mohair insert, waxless r-skin base structures offer an easy, consistent kick and maximum glide with no additional prep work.activ cap: - our active cap construction combines rossicap and multi-directional fiberglass for a supple flex from tip to tail to glide over uneven terrain and