Product Dimensions: The seat part is x 21 x3 inches (L x W x H), the backrest part is x 21 x3 inches (L x W x H). Pool lounge chair cushions come in vacuum packing, please use a hair dryer to pluff them up and wait 3-5 days restore thickness Waterproof: Made with a durable water proof Oxford fabric with waterproof coating on the back of the fabric which has a good performance of water splash-proof, UV-resistant, not easy to tear or fade. Bring it indoors when it rains or not in use for longer life and improved aesthetics. Excellent Detail Design: This patio lounge chair cushion adds a very superior design with adjustable straps - which can keep the cushion securely fastened to the chair; Piped edges- to add aesthetics and tightness. Hidden zippers - add beauty and security Easy Clean: There is a zipper on each of the seat and back cushion covers, and the cushion covers are removable for washing. And ties for the cushion to secure on your patio furniture. The seat and back cushions are detachable for easy splitting and combining. Multi-scenario: This casual lounge cushion is perfect for your patio, poolside, beach, deck, living room and anywhere indoor and outdoor, easy to clean with just soap and water wipe.