Constructed of HDPE material which is more durable than traditional material. Breathable fabric results in significant temperature reduction underneath the sail, blocks up to 90% of harmful UV rays but give you free air, ideal for patio covers, children sandpit covers. Energy saving and environmental protection, cool your house when installed outside the window. Easy to clean with mild detergent and water, fade resistant, will not mold, mildew, stain, tear. Easy to install, quality grade stainless steel D rings on each corner.