Abstract: The combination of a binding and boot is provided. The binding has a pair of pistons (7, 8) extending under the boot. Each piston is stressed by a spring (14, 15). The arms of a sole clamp (2, 3) act on these pistons. The pistons are connected together by a linking device (20). The combination magnetically controls the linking device which is capable of occupying a first position, in which the pistons arc secured by the linking device, and a second position in which one of the pistons is able to move on its own, at least over a certain travel common to the two pistons. The combination thus provides asymmetrical release resistance.