The Surge ST is trusted by professional big line riders and mountain town legends alike. Its a powerful binding perfect for big days and big lines. Solid baseplate design, stiffer Asym RipNFlip Highbacks, and more supportive Pillow Line Ankle Straps combine to give riders greater control in demanding terrain. All Surge ST bindings incorporate Spark R&D's industry-leading Tesla T1 technology. The Smooth Touring (ST) Tech is featured on ST Brackets and ST Whammy Bars. These components utilize a proprietary thermoplastic blend that is molded over the metal part reducing friction, increasing durability, and improving touring efficiency.  The Surge ST Asym RipNFlip Highback has a high amount of glass fiber fill for a stiff ride and maximum response. The bindings feature individual left and right highbacks for improved ergonomics, comfort, and control. The upper section of the highback is flatter giving riders excellent lateral mobility. All RipNFlip highbacks incorporate a tool