Flex Flex Rating – 6.5 (1 Soft - 10 Stiff) Baseplate Stage 11 | Asym Duraflex ST – Asymmetrical Baseplate For Increased Torsional Board Flex. All-new Astro Washer Prevents Heelcup Slipping. Made with Duraflex ST Nylon Molecular Bushing – Increased cushioning for hard landings, 15% lighter than Union Fused Vaporlite, and made to minimize foot fatigue. This is one vibration dampening baseplate! TPE Outsole – This new binding manufacturing process is ice and snow resistant and requires zero bushing glue. Highback Stage 15 | Ultra Duraflex ST – New from Union, this molecular highback has a bushing For increased freestyle flex and comes preloaded for quick edge to edge power. Made of Duraflex ST Nylon Straps Forma X Ankle Strap – Exoframe exterior for instant response, padded interior for all day long foot comfort. Exoframe connector acts as a suspension system for your boots. TS 5.0 Ultragrip Toe Strap Buckles Magnesium S1 with Steel Base – Union's proven bombproof ratchet system, Magnesium buckles are light, sleek, and durable on the mountain. Additional Features Mini Disk – Compatible with 2x4 and The Channel™ Grade 8.8 Hardware – The strongest steel available on the market, Union's use of Grade 8.8 represents a commitment to delivering the strongest and most reliable bindings on the market today. Extruded 3D Aluminum Heel Cup with Astro Washer Union Ultra Snowboard Bindings Womens