E.share&nbsp;20'&nbsp;X&nbsp;20'&nbsp;Sun&nbsp;Shade&nbsp;Sail&nbsp;Uv&nbsp;Top&nbsp;Outdoor&nbsp;Canopy&nbsp;Patio&nbsp;Lawn&nbsp;Square&nbsp;Desert&nbsp;Sand&nbsp;UV&nbsp;Block&nbsp;for&nbsp;Outdoor&nbsp;Facility&nbsp;and&nbsp;Activities for Patio&nbsp;Backyard Square Shade Sail Size 20ft x 20ft Sun shade can be used over a patio, driveway or other outdoor area to protect against UV rays Made of high-quality sun screen fabric, so it blocks up to 90% of harmful UV rays Free giving long durable ropes, strong sewing processing on each side, stainless steel D ring on each edge, strongly guarantee fastness of installation Allows rain to pass through, so there's no pooling water