a binding comprised of a flexible sole plate attached to a ski or other equipment at the toe , adjustable brackets attached to the sole plate at the sides of the toe and heel to restrict lateral movement of the toe and heel relative to the ski , and toe and heel straps to secure the foot to the binding . the toe strap passes over the toe and is attached to the front portion of the sole plate . the heel strap passes around the ankle , crosses behind the heel , and is attached to the rear portion of the sole plate .