Provided is a slipper including an outsole 100 in contact with a floor, a midsole 200 assembled on an upper side of the outsole 100 and supporting a foot of a user, and a balance foam 300 disposed between the outsole 100 and the midsole 200 and made of a memory foam material. The slipper is to be modified to fit a shape of the sole of the foot of the user by placing a balance form between the outsole and the midsole, thereby improving the wearing comfort of the user.

Footwear used for high performance activities such as running can be adhesively attached to the plantar surface of feet rather than uppers or straps. The upper surface of the protective layer of the footwear can have adhesive regions that secure the foot to the footwear and other regions that are not adhesively coupled to the foot. The adhesive regions can be under the heel, along the lateral side of the foot, under the first through fifth metatarsophalangeal (MTP) joints and around the perimeter of the foot above the plantar surface.

A sandal shoe comprising a flexible sole on the underside and a footbed on the upper side and releasable material, wherein the sole and the footbed comprise an elongate object of rollable bistable material, and a means for connecting releasable material to the sole and the footbed. Two embodiments thereof are described: the sole (2) and the footbed (3) enclose the rollable bistable material (4) or the footbed itself is the rollable bistable material. The means comprises for instance an attachment suitable for passage of releasable material, provided on the rear side of the footbed. An application for transporting the sandal shoe is further described wherein the sandal shoe is transported while rolled up, for instance in a bag or on an arm.

A device is described for detachable contacting of a battery cell (4) having a cell receptacle open against a joining direction (2), which cell receptacle is delimited by a contact spring base (1), from which contact tongues (3) protrude against the joining direction (2) for the jacket-side enclosure of the battery cell (4). To propose a device for detachable contacting of a battery cell (4), which enables a reliable electrical connection independently of the relative location of the inserted battery cells and substantially independently of their diameter even in the event of periodic mechanical strains, without making the assembling procedure more difficult, it is proposed that the contact tongues (3) have contact bodies (5) protruding radially into the cell receptacle in the form of a cut ovoid.