Product InfoIf you're a casual intermediate cruiser with averaged-size feet, the Tecnica Mach Sport MV 90 Ski Boot is exactly what you need this season. This boot places emphasis on comfort and convenience without hindering power or performance. It is created with a Comfort Liner and Celliant Insulation that converts body heat into infrared energy. This, in turn, increases circulation, oxygen and blood flow. If that's not enough comfort for ya, get a load of the Custom Adaptive Shape shell that can be customized to your foot shape for the perfect fit. A Double Quick Instep allows for easier entry and exit, while Lift Lock Buckles stay up and out of the when getting in and out of the boot. Product Details&sbsp;Last/WidthMedium 100mmFlexMedium for intermediate to advanced skiers.LinerComfort Liner w/ Celliant Insulation powered by 13 thermoreactive minerals that convert body heat into infrared energy. This energy penetrates deep into the tissue to increase circulation, oxygen and blood flow.MaterialCAS Shell (Custom Adaptive Shape) this shell allows for a better out-of-the-box fit with an anatomical shape that matches your foot. It includes dimples on the shell to reduce surface tension and help in the customization process.Double Quick Instep uses a large, softer plastic over the instep area to allow the shell to open easier when you are entering or exiting the boot.Polyolefin CuffStanceDouble Canting ScrewedBuckles4 Aluminum Micro-AdjustablePower Strap35mmSole TypeGripWalkFeaturesLift Lock Buckles (keeps the buckles open while you step in and out of the boots.; Product Specification&sbsp; Ability Level: Intermediate-Advanced; Flex: Medium; Liner: Comfort Liner w/ Celliant Insulation; Instep Height: Medium; Calf Volume: Medium; Sole Type: GripWalk; Ski/Walk: No; ;