The invention relates to a medical product for a fastening duration of at least 7 days having good skin compatibility, comprising a central adhesive compartment (3) and an over-patch, which is free of active ingredients and consists of a water-vapor-permeable back layer (1) and an adhesive polymer layer (2) free of active ingredients. The invention further relates to a method for the production of said medical product, and to kits of parts containing laminates of layers 1 and 2.