All mountain ski boots alpine ski boots suitable for men season 2017 skill level expert last 100106 mm widths narrow average wide flex index 120 flex hard special features adjustable foot width removable toe and heel pads adjustable flex easy entry thermoformable shell lining features thermoformable boot liner outer material polyurethane colour black fasteners buckle fastener velcro buckle 4 x micro adjustable aluminium buckles strap 45mm velcro