Abstract: A locking and unlocking device includes an actuation element and a lock and a rear deflector. The actuation element is mobile between a first position and a second position, controlling the position of the lock and the position of the rear deflector such that in the first position, the lock occupies a locking position to block an upper cuff in rotation relative to a shell base, and the rear deflector occupies a low position to close a cut-out at the rear of a shell base; and in the second position, the lock occupies an unlocking position to release the rotation of an upper cuff relative to a shell base, and the rear deflector occupies a high position to open up at least partly a cut-out at the rear of a shell base, in order to increase the amplitude of flexure of a lower leg in a sports boot.

Abstract: Sports boot element of which the wall includes at least two different plastics materials (15, 16), the wall having (i) a first zone (11) including the two different plastics materials within its thickness, the first plastics material (15) forming two layers of the wall constituting the internal and external faces of the said wall, and the second plastics material (16) being interposed between the two layers of the first plastics material (15), and (ii) a second zone (13) including only the second plastics material (16).

Abstract: Sole (20) for a sports shoe, notably for a cross-country ski boot, comprising a first component (1) acting as a framework and at least one second component (21) assembled with the first component (1), characterized in that the second component (21) comprises an anterior part (32) extending substantially longitudinally in the anterior part of the sole (20).

Abstract: A locking and unlocking device includes an actuation element and a lock and a rear deflector. The actuation element is mobile between a first position and a second position, controlling the position of the lock and the position of the rear deflector such that in the first position, the lock occupies a locking position to block an upper cuff in rotation relative to a shell base, and the rear deflector occupies a low position to close a cut-out at the rear of a shell base; and in the second position, the lock occupies an unlocking position to release the rotation of an upper cuff relative to a shell base, and the rear deflector occupies a high position to open up at least partly a cut-out at the rear of a shell base, in order to increase the amplitude of flexure of a lower leg in a sports boot.

Abstract: Sole (20) for a sports shoe, notably for a cross-country ski boot, comprising a first component (1) acting as a framework and at least one second component (21) assembled with the first component (1), characterized in that the second component (21) comprises an anterior part (32) extending substantially longitudinally in the anterior part of the sole (20).

Abstract: Sports boot element of which the wall includes at least two different plastics materials (15, 16), the wall having (i) a first zone (11) including the two different plastics materials within its thickness, the first plastics material (15) forming two layers of the wall constituting the internal and external faces of the said wall, and the second plastics material (16) being interposed between the two layers of the first plastics material (15), and (ii) a second zone (13) including only the second plastics material (16).