Paper hand towels should not be flushed but sometimes they are and they can cause blockages, particularly in areas where they may be put in vacuum toilets and closed drainage systems. These towels have been developed to be fast dissolving to overcome the problem. We can't stop them being flushed but at least they can help prevent the blockage. Use with dispensers AH116-BK, AH116-W, AH117-BK and AH117-W.