evo.com | Spark R&D Splitboard Bindings > The Spark R&D Arc ST Pro Splitboard Bindings build on the playful feel of the Arc ST with premium materials that shave weight without sacrificing performance. Carbon-reinforced nylon highbacks boost response, while Pebax(R) pillow line straps, ladders, and adjusters keep every gram in check for efficient backcountry days. Improved ST (Smooth Touring) Mode Spark injection molds a proprietary thermoplastic over existing aluminum or steel parts in a process called "overmolding," reducing friction and improving durabillity. Requires Pucks for Mounting in Ride Mode Spark Canted Pucks or Regular Pucks recommended (available to purchase separately) Carbon Reinforced Nylon Highbacks More responsive, lighter, and stiffer than the standard glass reinforced highbacks. Injection molding allows for more complex geometry and improved impact strength compared to other methods of carbon fiber construction. CNC Machined Baseplates Machined cutouts for maximum weight savings. Full Pebax Plastics Pillow Line Straps, Ladders, and Adjusters all made with Pebax, a premium material most often found in high-end ski boots as it provides consistent stiffness and improved toughness in cold temperatures. It's also 20% lighter than the standard material. | Spark R&D Arc ST Pro Splitboard Bindings 2027 - Large in Black | Nylon/Aluminum/Plastic