The K2 Boundary follows a tried-and-true formula that delivers on its promise of being a snowboard boot you’ll love from the first time you put it on. It nails the sweet spot for freestyle and all-mountain snowboarders who prioritize flex, comfort, and fit.

The K2 Boundary snowboard boot features a dual-zone closure with BOA® Fit System to micro-tune your fit. A dedicated BOA® dial for the upper shell and a second dial dedicated to closing the lower part of the shell. The upper cuff of the boot is constructed with our HDR Premium Synthetics. It features a fully articulating design, upping the durability factor while reducing the distortion of the shell as it flexes forward.

Inside, a supportive three-point harness is integrated into the shell, wrapping itself around a thermoformable Intuition® Control Foam 3D liner for the ultimate fit.

Underfoot, our proprietary This Grips!™ rubber outsole provides excellent grip while hiking, boot packing, and walking across icy parking lots and sits atop a dual-density midsole. This midsole features a lightweight EVA material and is complemented with our Harshmellow™ damping material to cushion your bones and reduce fatigue after long days on the hill.

Tech Specs

• H4/M3 ZONAL BOA® FIT SYSTEM: boa Impact-resistant, durable, and performance-driven, the H4 BOA® Dial ejects on severe impact and is easily re-inserted into the boot. The H4 dial controls the upper shell lacing, while the M3 dial controls the lower shell lacing.
• 3-POINT HARNESS LINER LACING: The 3-Point Harness is a straightforward solution that doesn’t skimp on support. Instead, this system aims to optimize heel hold while providing ankle support and unrivaled stability to help reduce fatigue. A taller Pro Version is found on Orton and Format models for additional support.
• THIS GRIPS!™ RUBBER OUTSOLE: this grips Our proprietary rubber compound delivers excellent grip and durability on all terrain types and is integrated with Harshmellow™ foam to dampen chatter and vibration.
• INTUITION® CONTROL FOAM 3D LINER: The most versatile liner in the K2 Snowboarding line, the Control Foam 3D liner features both internal and external J-Bars for the perfect blend of comfort and structure.
• ARTICULATING UPPER CUFF: Articulating cuff upper helps reduce shell distortion when flexing forward into the snowboard boot.
• HDR™ PREMIUM SYNTHETIC UPPER: Eight times more durable than a standard polyurethane material, HDR Premium Synthetics is a proprietary synthetic durable finish designed for extreme conditions. The dynamic resin system provides exceptional abrasion and durability beyond traditional synthetic materials.
• HARSHMELLOW™ VIBRATION DAMPING: harshmellow Harshmellow™ is a magical dampening system that replaces industry-standard foam dampening materials. Harshmellow™ is strategically placed to dampen vibration underfoot to provide a more “quiet” feel underfoot, reduce vibration from impact, and reduce fatigue while snowboarding.
• 3D FORMED EVA FOOTBED: Provides anatomically correct cushioning and support and is built from rigid EVA foam.