Ostomy Appliance

An ostomy appliance comprising:

• first and second walls connected to each other at or near their peripheries, the first wall having a stoma-receiving opening;
• a connection member connected to the first wall for attaching the appliance to a user;
• an aperture located in either of the first and/or second walls for permitting waste gases to exit the appliance;
• a multi-layer filter positioned adjacent and covering the aperture on an exterior surface of the respective first and/or second wall,
• wherein a layer of the filter is hydrophobic and wherein said hydrophobic layer is positioned directly adjacent the respective first and/or second wall,
• wherein the hydrophobic layer has a first side and a second side and wherein the first side is connected directly to the respective first and/or second wall, said connection holding the multi-layer filter relative to the wall,
• wherein the aperture is substantially the same size as the multi-layer filter.