PTEX 4500 Base Industry-accepted as the premium base material, this sintered UHMW-PE base provides very high density for excellent durability and wax retention, combined with high carbon content for superior glide. High Performance Pre-Preg Fiberglass High-strength E-Glass fiber is oriented along multiple axes and optimized to provide a smooth and consistent flex profile, longitudinal strength, and torsional stiffness. Toughened epoxy resin is added in precise quantities prior to ski manufacturing to ensure precise weight and consistent quality. This layup is engineered to minimize weight for uphill missions without sacrificing durability or downhill ski performance. Full-Perimeter ABS Sidewalls ABS sidewalls wrap the entire perimeter of the ski, offering optimal durability and damping. Used on skis designed for maximum downhill performance and durability, but optimized for minimal weight.