Bandage set suitable for use in the treatment of wound cavities, especially for use in the treatment of wound cavities by means of negative pressure, comprising i) a first bandage material as wound contact layer, comprising a flexible, perforated film (11, 21, 31) having a first and a second side, the perforations present in the film being provided in such a way that the perforation edges protrude from the second side of the film (11, 21, 31), with three-dimensional structures being present on the second side of the film (11, 21, 31), and the first side being intended for contacting with a wound base, more particularly the internal surface of a wound tube, ii) a separately provided second bandage material for introduction into a wound cavity, comprising a porous polymer foam (12, 22, 32), the polymer foam (12, 22, 32) being an open-cell polymer foam which comprises struts on or close to its surface and/or which comprises, on its surface, hollow spaces open toward the surface, and the struts and/or hollow spaces forming three-dimensional structures, characterized in that the first bandage material has a surface area sufficient to envelop at least 75% of the surface of the second bandage material, and the structures present on the second side of the first bandage material can form an adhesive connection with the structures present on the surface of the second bandage material, the second side of the film (11, 21, 31) being intended for partial or complete envelopment of the surface of the polymer foam (12, 22, 32) immediately before the wound treatment, and so, after introduction of the composite composed of first and second bandage material into a wound cavity, movement of the first bandage material with respect to the second bandage material can be avoided as far as possible during the therapy and/or simultaneous removal of the first bandage material and the second bandage material is facilitated owing to the adhesive connection between the first bandage material and the second bandage material, wherein a static sliding friction force F s, measured in accordance with DIN EN ISO 8235, of at least 3 N is required in order to move the first bandage material in the wet state against the second bandage material in the wet state and/or wherein a static sliding friction force F s of at least 6 N, measured in accordance with DIN EN ISO 8235, is required in order to move the first bandage material in the dry state against the second bandage material in the dry state. i) a first bandage material as wound contact layer, comprising a flexible, perforated film (11, 21, 31) having a first and a second side, the perforations present in the film being provided in such a way that the perforation edges protrude from the second side of the film (11, 21, 31), with three-dimensional structures being present on the second side of the film (11, 21, 31), and the first side being intended for contacting with a wound base, more particularly the internal surface of a wound tube, ii) a separately provided second bandage material for introduction into a wound cavity, comprising a porous polymer foam (12, 22, 32), the polymer foam (12, 22, 32) being an open-cell polymer foam which comprises struts on or close to its surface and/or which comprises, on its surface, hollow spaces open toward the surface, and the struts and/or hollow spaces forming three-dimensional structures,