Ostomy pouches

An ostomy pouch comprising a first wall of substantially liquid impermeable and gas impermeable plastics material, an aperture provided in the first wall to allow venting of flatus therethrough, a comfort layer provided outside the first wall, and a filter cover layer outside the comfort layer and secured to the first wall through the comfort layer, the cover layer and the portion of the first wall underlying the cover layer defining a housing in which is received a filter for processing flatus vented through the aperture.

An ostomy pouch comprising a pouch envelope and an adhesive wafer for directly or indirectly securing the pouch envelope to a person's skin, wherein the wafer, or a cover layer provided on the wafer, is provided with guidelines for enabling a person to cut the wafer to a desired aperture size, the guidelines including at least one generally circular guideline, and at least one generally non-circular guideline, and the adhesive wafer being secured to the envelope around a closed loop line of attachment, the line of attachment having a shape which is non-circular and non-race-track, wherein the line of attachment is defined by a combination of a circular shape and a race-track shape, the combines shape corresponding to a silhouette of one superimposed on the other.