All mountain ski boots freeride ski boots suitable for men season 2017 skill levels expert advanced last 102 mm widths average wide flex index 110 120 flex hard special features with canting easy entry thermoformable shell insertable spoiler adjustable foot width lining features thermoformable boot liner canting single canting outer material polyurethane colour black fasteners buckle fastener velcro buckle 4 x micro adjustable spine tech alloy b