An ostomy bag (1) for receiving bodily waste comprising； an outer protective pouch (3) comprising a laminated material with an outer layer of water-impermeable material (15) and an inner layer of water-soluble material (13)； an inner waste-collecting pouch (5) enclosed within the outer protective pouch (3) comprising a laminated material with an outer layer of water-soluble material (9) and an inner layer of water-impermeable material (7), and means (23) defining an orifice (19) to enable bodily waste to enter the inner pouch (5)； wherein the outer protective pouch (3) is removeably sealed and both the outer protective pouch (3) and inner waste-collecting pouch (5) are of a structure which is weakened upon immersion in a toilet bowl to both become less buoyant such that the bag (1) can be flushed away.
