Kidneykaren is much more than just an accessory. Kidneykaren is a new product category in the fashion and sports sector, which belongs as naturally in the wardrobe as gloves, scarf or underwear. The idea for Kidneykaren came on one of Berlin's notorious winter days. Again and again the icy cold crept between trousers and jacket. Since a classic kidney warmer would have been far too unfashionable, a special all-round warming cold protection was developed. Kidneykaren has succeeded in developing the idea of the classic kidney warmer into a multi-talented and multi-functional tube.