Shell
A contemporary ski boot shell consists of two components: the Lower Shell and Upper Cuff. These two pieces are connected by a pivot point on either side of the ankle. Both of these are made of varying types of plastic and sometimes other materials such as carbon fiber.
2a. Upper Cuff
The upper cuff can be separated from the lower shell. It features a wrap design that sees two layers wrap across each other over the shin and the top of the ankle.
2b. Lower Shell
The lower shell is a stiff plastic structure that serves as the interface between the binding and boot. The lower shell is anatomically shaped to improve fit and control, and can be customized to fit specific foot shapes.
Boot Board
The boot board is a removable floor that rests on the bottom of the inside lower shell and in between the boot liner. A bootboard can be customized and provides an additional layer of insulation beneath the foot.