In order to be as light as possible, these touring bindings consist of a pin front and pin heel (like Marker Alpinist). The ski touring boot is held in position by the pins at the front and by steel pins in a special V-shaped receptacle in the heel of the boot. With frame bindings with regular toes and heels, the boot is clamped. Clamping in both directions (from top to bottom and from back to front) ensures stronger and more direct power transmission for the best possible downhill pleasure. More about the functional principle also in chapter “Pin binding vs. frame binding”.