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. 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. CNC Machined Baseplates Machined cutouts for maximum weight savings. Designed for use with a hard boot setup (but gaining favor with soft booters as well), the Spark R&D Canted Pucks feature oversize aluminum discs with 3 degrees of inward cant. Add some cant and save those knees! 3deg Canting (Inward Angle) A favorite among hardbooters. Your knees will thank you. Compatible with All Spark R&D and Other Brands' Puck Compatible Splitboard Bindings (Except K2 Kwicker) Aluminum Discs with Nylon Bases Discs Aluminum Nylon Bases | Spark R&D Arc ST Pro Splitboard Bindings 2027 - Large Package (L) + Splitboard Hardware in Black | Nylon/Aluminum/Plastic