Salomon X Pro 90 W Ski Boots - 2015 Women's Flex Index 90 Strap 35 Last 100/106 4 micro alu buckles - To micro adjust the length of the buckles for a precise and personalized closure, just turn the lever. Alu buckle: more resistant, rich finish, accepted by all athletes because they feel confident & reassured. Women calves adjustment - The most efficient and convenient calves adjustment on the market. Only one screw turn to enlarge the upper cuff up to 1cm to fit all legs shapes easily and quickly.