High Quality Material: The cushion cover is made of staple polyester cloth, which is year-round use,breathable and UV resistant,fade resistant for 2 years. High Resilience Sponge: The filling material is made of highly resilient sponge, wrapped in a layer of non-woven fabric. It is truly soft, and highly elastic, and can absorb human pressure and provide ergonomic softness to hard chairs. With Straps for Fastening: Attached straps can keep outdoor cushion pads securely fastened to your chairs to secure this accessory to your lounge and not move while in use. Removable Cushion Cover: Seat cover and backrest cover are both removable with a zipper. Piped Edges make cushion cover more smooth and good-looking.