All mountain ski boots suitable for men season 2016 skill levels advanced expert last 100 mm width average flex index 110 flex medium special features adjustable flex adjustable forward lean walk to ride wtr compatible thermoformable shell high thermal insulation lining features thermoformable boot liner weight 2 126 g outer material polyurethane fasteners buckle fastener velcro buckle 4 x edge 7000 buckles strap 45mm velcro strap inner materia