Coolaroo shade cloth is the perfect outdoor fabric. Designed to "breathe", it allows cooling breezes to flow through, significantly reducing temperatures beneath by up to 32-percent. This state of the art material blocks up to 70-percent of the suns harmful rays yet remains totally unaffected by moisture and natural temperature extremes and because Coolaroo fabric is knitted, not woven, it won"t tear or fray and the special Coolaroo process ensures colors remain vivid for years.