The rowdiest looking descent in the backcountry usually has the most technical ascent to reach it, and the K2 Mindbender 120 Ski Boot is up for both tasks. It's the second-stiffest boot in K2's backcountry collection of ski boots, and it accommodates intermediate-to-advanced and heavier skiers comfortably. The Mindbender touts a narrow 98mm last designed for precision, and both the shell and liner are thermo-moldable that conforms to your footshape for a comfier fit. In ski mode, the Mindbender's walk mode locks in place without any wiggle room; in walk mode, the boot boasts a massive 50° walking range for easy hiking. Gripwalk rubber gives the sole plenty of traction when you're boot-packing up icy chutes.