Description of Nordica Gran Sport 10 Ski Boots Nordica’s Gran Sport 10 ski boots pride themselves on ease of use combining the comfort and convenience of rear-entry liners with the flex index of a sporty performance shell. With a ski/walk device that automatically releases the rear cuff allows you to walk with a natural free motion when the upper buckles are unlatched. Comfort Fit liners are heat-moldable and provide all day comfort on the mountain. Easy to use comfortable performance ski boots. Features: Tr. Polyether bi-injected shell material Polyolefin cuff and flaps material Automatic Ski-Walk device Servolock upper buckle 4 ALU Micro buckles Multimacro ratchet PFP Performance Fit liner Fur Lining Flex Zone liner insert Performance Fit footbed 35mm Power Driver strap Removable rear spoiler Air System (surrounding the upper heel contour) 100 Flex Index