Abstract: An insole which is substantially adapted to the profile of a human foot and comprises, in the mid-foot region, an elastically deformable arch facing the foot, characterized in that a reinforcement element is located on the side of the insole facing away from the foot in the region of the arch, said reinforcement element being made of a different material with a greater stiffness than the material of the insole and having a convex shape.

Abstract: An insole which is substantially adapted to the profile of a human foot and comprises, in the mid-foot region, an elastically deformable arch facing the foot, characterized in that a reinforcement element is located on the side of the insole facing away from the foot in the region of the arch, said reinforcement element being made of a different material with a greater stiffness than the material of the insole and having a convex shape.

Abstract: This invention relates to an insole which is essentially adapted to the profile of a human foot and has, in the middle foot area, an elastically deformable dome-like arch that faces the foot. To reduce the technical and financial production expense of an insole and to improve the wearing comfort of a shoe through an insole, in particular an insertable insole and to improve the fitting shape of the shoe by means of an insole and to feed air into and out of the shoe interior with the aid of an insole, the insole according to the invention exhibits in the region of the elastically deformable arch at least one ventilation opening, which during walking causes ventilation of the shoe interior in conjunction with the elastically deformable arch.

Abstract: The present invention relates to a protective aid for protecting the hands and wrists of skaters, which comprises a first protective element to be arranged on that region of the hand palm situated near the wrist. The protective aid comprises moreover a second protective element which can be arranged on the inside portion of the wrist and which is connected to the first protective plate via a connecting element. The protective aid is provided with engagement means for engaging the hand and/or wrist of the user, in order to firmly connect the protective aid to the user's hand, during use.