A medical device for use in collecting bodily waste material includes a main pouch (1) with an attachment area for attachment to a patient body interface (11). The main pouch (1) has a front side (3, 4) with a re-closable aperture therein, wherein the front side (3, 4) furthermore includes a sealing assembly (2) of a double line-type. The medical device can be an ostomy bag or a wound management bag.
