With an award winning design and high spec technical features the Rossignol Alltrack Pro 100 Ski Boot offers the discerning skier a versatile fusion of downhill power and precision with a smooth hiking performance to get you to that perfect powder stash and of course it also increases comfort when relaxing at lunch or during après activities. The generative design grid technology shell and dual core polyolefine cuff allows weight to be taken out of the boot without compromising performance. Ski boot comfort makes or breaks a day on the mountain so the Alltrack Pro 100 comes with Rossignols full custom T3 liner with Thinsulate stretch insulation, this liner has been designed into 4 key zones to give the best foothold, performance, and comfort.to give you the perfect fit and warmth.Rossignol Alltrack Pro 100 Ski Boot Features:   Polyurethane Shell with Generative Design Grid Technology Dual Core Polyolefine Cuff Full Custom T3 Polyethylene Liner Thinsulate Stretch Insulation 4 Micro Adjustable Alu Buckles 50° Motion Range in Hike Mode Alltrack LT Alpine Sole Gripwalk Compatible Last 100mm Flex Rating 100