Abstract: A binding is provided for use primarily on cross-country skis, which binding is adapted to selectively control the boot with respect to the ski and allow the boot and ski to function in one of the several different modes. Attached to the heel of the boot is a plate that is formed with a rearwardly facing vertical groove and indent located along the groove. Mounted directly behind the boot on top of the ski is a multi-position mechanism having a plunger adapted to engage, partially engage or fully disengage the plate on the boot. Thus, by appropriately positioning the plunger, the boot may be held immobile against the ski, allowed to move only vertically at the heel or to be entirely free and clear at the heel.