evo.com | K2 Snowboard Bindings > The K2 Sonic Snowboard Bindings are K2's entry level snowboard binding. They're built to be extra flexible and extra durable with an eye towards easy progression and longevity. They're full featured bindings that will give you everything you need and more, from fully tool-free adjustability to bomber straps, highbacks, and buckles. Strap into the Sonic and get yourself out on the hill. 100% Tool-Less Adjustments Ankle straps and highbacks can be adjusted with human hands, and ankle straps can be centered with the pop of a lever. Keep it simple and enjoy. PC ProFusion(TM) Chassis Simple, tough, and lightweight, the ProFusion(TM) chassis is the go-to standard in the K2 binding collection. On-board tool-less power ramp and toe strap adjustments are paired with multiple ankle-strap mount points to help dial in perfect fit and ideal power transfer. AT PC Highback The most durable temperature resistant highback shapes that make every K2 binding model perform best for its designed purpose. P.I. Ankle Strap Available on Sonic and Cassette binding models, the new P.I. ankle strap is forgiving, comfortable, and lightweight Flex Rating 3 (1 Soft - 10 Stiff) | K2 Sonic Snowboard Bindings 2026 - X-Large in Black