An anal pad for preventing soiling of underwear due to undesired anal discharge. The anal pad includes a thin outer shell enclosing a semi-rigid shell. The semi-rigid shell may be a layer on one interior surface of the outer shell and it may also partially cover the opposite interior surface of the outer...http://www.google.co.uk/patents/US4880417?utm_source=gb-gplus-sharePatent US4880417 - Deodorizing and sound muffling anal pad
