evo.com | K2 Snowboard Boots > The K2 Thraxis Snowboard Boots don't mess around, they're the heavy hitters built for riders who like their lines steep, fast, and a little unreasonable. Combining powerhouse response with all-day comfort, these boots lock in a precise fit, absorb rough terrain, and keep charging season after season. When the mountain gets serious, the Thraxis answers back. H5 Coiler Zonal BOA(R) Fit System Impact resistant, durable, and performance-driven, the H5 BOA(R) Dial ejects on severe impact and is easily re-inserted into the boot. One dial controls the upper shell lacing, and the other maintains the lower shell lacing. Endless adjustability and precise fit. Turn to tighten, turn in reverse to loosen, pull up for a quick release. Intuition(TM) Pro Foam 3D Liner with SpaceHeater(TM) A premium and heat-moldable liner built with Intuition(R) foam and lined with breathable heat-reflective SpaceHeater(TM) technology for superior warmth and comfort. Eco Harshmellow(TM) Pro Insole Three separate compositions, Pro, Plus, and Base, now all incorporate K2's proprietary Harshmellow(TM) damping into the layup of the footbed. The result is superior vibration absorbing and comfort for all-day excursions into the backcountry or hiking and riding around the resort. Internal and External J-Bars Bars with cored ankle pockets. Flex Rating 10 (1 Soft - 10 Stiff) | K2 Thraxis Snowboard Boots 2027 - 10.5 in Black