A buckle includes a base and a grip lug. The base underside can be placed against and fastened to a boot shell. The base upper side has at least one first receiving extension. In an engagement position a swivel element on the lug is latched at least in certain regions in the first receiving extension to form a swivelable first latching connection, to permit swiveling the lug in the engagement position from an open into a closed engagement position by the swivel element. At least one first latching extension is on the base upper side, and the lug has at least one latching element corresponding thereto. In the closed position, the latching element is latched at least in certain regions on the first latching extension to form a releasable second latching connection, to secure the lug against leaving the engagement position and against swiveling into the open position.

An anchoring plate for a closure device for a sports footwear and a closure device for a sports footwear incorporating such anchoring plate are provided. The anchoring plate comprisesin addition to a body provided with hooking seats for the hooking member of the tensioning member of a closure devicean extendable member which is movably connected to the body and is provided with at least one additional hooking seat. In this way, a closure device incorporating the anchoring plate can move from a configuration in which the user's foot is firmly held inside the sports footwear to a configuration in which the user's foot has a certain freedom of movement inside the footwear, and in either of the configurations the elements of the closure device are retained in some way, so as not to be of hindrance to the user.

Ski boot comprising a rigid shell that is shaped so as to accommodate the foot of the user, and a rigid cuff that is shaped to as to surround the ankle of the user, and is pivotally jointed to the shell so as to be able to pivot about a rotation axis substantially perpendicular to the midplane of the boot; the shell comprising a substantially basin-shaped, rigid casing which is shaped so as to be able to accommodate therein the foot of the user, and a transversal stiffening insert which is embedded inside the bottom wall of the casing at the tarsophalangeal region of the sole of the foot, and is structured so as to emerge/surface on the outside of the rigid casing on opposite sides of the midplane of the boot, at the two lateral sides of the tip of the shell; the transversal stiffening insert being provided with two first conjugated coupling ends that surface on the outside of the rigid casing along the two lateral sides of the tip of the shell, on opposite sides of the midplane of the boot, and are structured so as to be engaged and clamped in an axially rotating manner about a transversal reference axis by the toe piece of the ski binding device, and of two second conjugated coupling ends that surface on the outside of the rigid casing along the two lateral sides of the tip of the shell, on opposite sides of the midplane of the boot, spaced beside said first conjugated coupling ends.