The AllSpeed 100 from Rossignol is a great boot for the intermediate to advanced skier who has a medium width forefoot and shaft of the leg. Rossignol's Custom T3 Liner has an anatomic 3D fit that can be heated and molded for a customized fit. Thinsulate Insulation in the liner keeps you warm and skiing to the best of your ability when it is cold out. The Sensor Blade Technology has ridges in the upper and lower shell that enhance your responsiveness when the speed ramps up while driving power efficiently towards your skis and reducing the total weight of the boot. A softer plastic insert that is molded across the top of the foot allows your foot to slide in and out of the shell with little effort.