BD Black Diamond Helio 88 ski mountaineering ski is ultra-light and performs on the most technical climbs and descents, made with a balsa wood core and carbon fiber coating. Carbon fiber is designed to offer you better strength, torsional rigidity and balanced flexibility. The ABS sides guarantee maximum cushioning for smooth, safe and controlled skiing. Optimal use: 30% soft snow, 70% hard snow. Mounting with telemark attacks is not recommended. Lenght (cm) 158 168 178 Sidecut (mm) 119/88/110 121/88/111 123/88/112 Radius (M) 16 17 18 Weight (Kg) 2.4 2.6 2.7 Mounting Specs. BD Black Diamond Helio 88 ski touring skis