High water absorbtivity. Prevent algae growth. Mould resistance. High cooling efficiency  Air flows horizontally, while the re-circulating water flows vertically, through the pad. The water is collected at bottom of the pad and is re-circulated again by a pump through the unique gutter system. * The normal delivery car can’t take it Because of the volume of the product,  please chose for 3-6 days delivery or Shop pick up