All mountain ski boots suitable for men season 2017 skill level advanced last 100 mm width average flex index 120 flex medium special features adjustable forward lean thermoformable shell high thermal insulation lining features thermoformable boot liner weight 2 148 g outer material polyurethane fasteners buckle fastener velcro buckle 4 x edge 7000 buckles strap 50mm velcro strap shoe technology memory fit template square 13 15 17 serie