There is good reason that Apex is one of the most expensive boots on the market; it is packed with a combination of features put together unlike any other boot. The heat-moldable custom walking inner boot has a BOA coiler closure system; a composite shank for support, stability and enhanced energy transfer; and a rubber high-friction outsole for secure walking. The chassis of the boot is 100% carbon fiber and has a rigid foam-insulated floor for added warmth. A carbon fiber cuff is fully adjustable for custom shaft alignment. Apex’s- A-Flex Suspension System” connects the cuff to the lower chassis, allowing flex adjustment and range of motion. High end buckles secure the walking inner boot to the carbon chassis and allow for easy entry.