The Apex MC-2 Ski Boots are presumably the most comfortable ski boots on the market. Apex boots have a snowboard boot inside with a ski boot frame. The boot has a heat-moldable inner liner and a dual BOA® Fit System which allows you to cinch the upper and lower sections independently of each other. The patented Open Chassis? provides the support and stiffness each individual may need for skiing and has an adjustable flex you are able to set however you like. You can even step out of the Chassis Frame and use the boot either for snowboarding or for walking around.