ENHANCED CONTROL AND REDUCED FATIGUE - THE K2 B.F.C. 80 2020 SKI BOOT. If you're looking for more control and rebound and less fatigue, this is the boot for you. The K2 B.F.C. 80 2020 Ski Boot features a Powerfuse Spyne for added strength and power and Energy Interlock technology for a smoother and more progressive flex. The EVA foam liner ensures a comfortable and supportive fit, while the hands-free entry design eliminates frustration from your day on the slopes. FEATURESPowerfuse Spyne: A rear co-injected GC YGC shaped support that adds strength and power to the Energy Interlock in order to maximize fore/aft flex efficiency and lateral stiffness for responsiveness in every type of terrain.Energy Interlock: A rivet-free technology that integrates the cuff and shell, putting less stress on the bootGCOs material and produces a smoother, progressive flex.Dual cuff alignment index: Dual sided cuff alignment for +/-2 degrees of cuff adjustment.Gripwalk Outsole systemHands free entryLast width: 103mmShell material: TPUCuff material: Polyolefin