Abstract: Breathable outsole (11) for footwear, in which the outsole has a two-layer structure. The two-layer structure contains an elastic and water vapor-permeable inner layer (1) and an outer layer (2) that covers less than 70% of the inner layer (1). The breathing activity of outsole (11) is guaranteed by the preferably microporous structure of inner layer (1) and the configuration of outer layer (2). The configuration of outer layer (2) is such that the surface of inner layer (1) available for water vapor exchange is restricted as little as possible. A microporous structure of insole (1) is achieved, for example, by a sintered plastic.

Abstract: A process which serves to seal and waterproof the outsole-side end area of a waterproof shoe shaft and/or to pad the outsole-side end of a shoe by putting a liquid, curable, filling material into the space between the insole and outsole is described. The outsole is provided with an input opening for putting in the filling material. The outsole is adhered to the shaft only in a circumferential area and in such a way that the outsole-side end area of the shaft remains unadhered. The liquid filling material is put in through the input opening, between the insole and the outsole, from where it flows into the outsole-side end area of the shaft due to its good flowability. The liquid material contains polyurethane precursor ingredients which react to form a foam polyurethane.