Head Challenger 120 Ski Boot - Men's: A brand new model this year to HEAD’s esteemed boot line is the CHALLENGER 120. With a Flex of 120, this boot features a slick ski-hike mechanism for uphill and downhill performance, an all-new Perfect Fit Liner for complete heat customization, Spine Tech buckles with a Double-Power Lever closure system, and Adaptive Fit technology. With Adaptive Fit technology, you can change the last width of your boot from 99-101mm (and vice versa), with the simple turn of a hex key on the boot sole. The CHALLENGER is the ultimate boot to keep your feet secure and comfortable so you can put all your focus into challenging yourself. What’s Your Limit?