Alpine ski boots all mountain ski boots suitable for men season 2017 skill levels expert advanced last 100106 mm widths narrow average wide flex index 110 flex medium special features adjustable foot width removable toe and heel pads easy entry adjustable flex thermoformable shell lining features thermoformable boot liner outer material polyurethane colour yellow fasteners buckle fastener velcro buckle 4 x micro adjustable aluminium buckles stra