Petra's 20 Ft. X 10 Ft. Waterproof Rectangle Sun Sail Shade. Durable Woven Outdoor Patio Fabric w/Up To 90% UV Protection. 20x10 Foot. (Terracotta) Dimension: 20' x 10'' 200gsm UV stabilized, high density polyester. Waterproof and easy to install. Made of high-quality sun screen fabric,blocks up to 90% of harmful UV rays. Sun shade can be used over a patio, driveway or other outdoor area.