Racing ski boots suitable for men season 2016 skill level expert last 98104 mm widths narrow average wide flex index 130 flex hard special features straps on boot liner rear adjustable foot width thermoformable shell easy entry lining features thermoformable boot liner outer material polyurethane colour yellow fasteners buckle fastener velcro buckle 4 x micro adjustable aluminium buckles strap 45mm velcro strap shoe technologies custom shell 36