By far the most effective mulching mowers are those that are dedicated machines with no other function than to mulch grass clippings. Designed with domed cutting decks that produce maximum under-deck airflow, grass clippings are held and tossed around repeatedly to meet the specially shaped blade surface as many times as possible. This process creates the most rapid decomposition of the clippings and the best results for your lawn. Single purpose machines are also the simplest mowers to use with no unnecessary attachments or grass collectors to hinder performance or manoeuvrability.