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