High Quality Guarantee - Constructed of 185 gsm UV protected high density polyethylene (HDPE) shade fabric with strong stitched seam and durable stainless steel D-rings in each corner( The edge is curved, not straight & Hardware kits and ropes are not included for this shade sail)Breathable Material Design - Allows cooling breezes and light to pass through for better airy and comfortable space, allows rains to pass through, so there's no pooling water( So it is not waterproof)Easy to Installation and Maintenance - with detailed instruction in the package. Clean with mild detergent or water, do not scrub it with a stiff brush, do not put it in your washing machine, clothes drierLong Use Time - 5 years warranty under normal use and weather. Please note that shade cloth is a material can shrink, usually it needs tolerance for +-6 inch for each side, thank youIdeal Shade Solutions - Widely used over a patio, lawn, garden, pool, pond, deck, kailyard, courtyard, backyard, dooryard, park, carport, pergola, sandbox, driveway or other outdoor area to provide 80%-85% sunshade and protect against 95% up to 98% harmful UV rays, and make your patio privacy safe, cool and fabulous