The K2 Men's BFC 100 Heat GripWalk® Ski Boots are packed with great features that make them the most comfortable boots you'll ever wear. These boots max out the comfort meter with their 103mm last, heat-moldable shell, Apres Mode, and heated Therm-ic® liner. They are easy to get into and designed for all-day comfort and feature a dual material overlap for intuitive and easy hands-free exit and entry. The BFC 100 Heat are designed with a Powerfuse Spyne, which is a rear co-injected Y shaped support that adds strength and power to the Energy Interlock™ in order to maximize fore and after flex efficiency and lateral stiffness for responsiveness in every type of terrain. Speaking of Energy Interlock™, these boots are equipped with its rivet-free technology that integrates the cuff and shell, putting less stress on the boot's material and produces a smoother, progressive flex. The K2 Men's BFC 100 Heat GripWalk® Ski Boots are the ticket for skiers who value warmth and ease of use above all else.