Black Diamond Helio 105 Ski - in stock now. FEATURES of the Black Diamond Helio 105 Ski Versatile 105-mm waist with early rise tip and tail Pre-preg carbon fiber layup offers torsional stiffness and balanced flex Ultra light engineered balsa flax wood core 5 mm beveled ABS sidewalls ABS tail protector with integrated skin-clip tab Optimal use: 70% soft snow/30% hard snow