Coolaroo state-of-the-art material blocks up to 90 percent of the sun's harmful rays yet remains totally unaffected by moisture and natural temperature extremes. Coolaroo shade cloth is the perfect outdoor fabric. Designed to 'breathe', it allows cooling breezes to flow through, significantly reducing temperatures beneath. Coolaroo's knitted construction prevents tearing and fraying and the special Coolaroo process ensures colors remain vivid for years.