HIGH QUALITY FABRIC - Our retractable shade cover is made of high quality polyethylene, it can block most of strong sun rays but let some light get through. And it allows air to pass through with breathable fabric . RETRACTABLE DESIGN - It allows you to retract the canopy if you want to enjoy the sun and extend it to provide shade. You are able to determine the flatness of the cover by setting the desired distance between each panel with the coming control tape. Please note: the size listed is already included wave drop (2’ between each panel). U-SHAPE COVER - This retractable shade cover can be pull back easily and you can close shade cover when it not in use. Each panel rod has three pre-drilled hole on each end for you to choose from to attach the shackle and snap hook which needs to hang onto the wire cable on each side. PERFECT OUTDOOR SUN SHADE - Our retractable shade is ideal for providing shade for your pergola frame, patio, deck, yard and more. Perfect for outdoor activities, you can have parties or rest under it. EASY TO INSTALL - Package comes with almost everything you required for installation. Please contact us via amazon message if you missing any parts or you have issue with installation. Retractable Sun Shade Canopy