Abstract: An item of footwear, in particular for sport, includes a sole, a double-crossbow shaped elastic structure, having an upper wall and a lower wall which define an empty space inside them. The elastic structure is placed in the sole so as to elastically react under the weight of a foot. An element extends from one of the walls and is suitable for going into abutment against the opposite wall when the crossbow structure is not compressed.

Abstract: A sport boot includes a sole, an upper associated with the sole which extends substantially continuously to cover, in use, at least the instep, the sides of the foot and a back of the heel, and has an upper edge which defines an opening for insertion of the foot. The upper includes a rear insert which in use covers the back of the heel and is made of a foldable and/or yielding material to be folded towards an inside of the boot to enable insertion of the foot into the boot from the rear part of the boot. A front insert which in use covers the instep, is also made of a yielding material to bind the upper part of the foot uniformly without use of laces and loops and improving comfort and foot-to-ball sensitivity.

Abstract: An item of footwear, in particular for sport, includes a sole, a double-crossbow shaped elastic structure, having an upper wall and a lower wall which define an empty space inside them. The elastic structure is placed in the sole so as to elastically react under the weight of a foot. An element extends from one of the walls and is suitable for going into abutment against the opposite wall when the crossbow structure is not compressed.

Abstract: An insole for shoes for soccer, running or similar sports having a contoured plate-like element made of plastics, which has a first through slot composed of a transverse portion which lies ahead of the position of the line of optimum flexing of the foot, and of two longitudinal portions which protrude from the preceding portion toward the plantar arch. The insole further having a second through slot which extends from the outward region of the heel, adjacent to the plantar arch, and has a first portion directed forward, a second portion directed backward, and a wider end portion arranged in a central rear region.