Polyester Includes two 20" X 20" outdoor seat cushions, with a plush, overstuffed construction for enhanced comfort and longevity Cushion cover is made from 100% outdoor polyester fabric that is UV, water, and stain resistant Cushions are filled with a soft polyfiber material made from 100% recycled, post-consumer plastic bottles String ties help keep cushion securely attached to outdoor furniture, while the circle tack construction prevents cushion fill from shifting and bunching For best results, and to extend the life of your cushions store covered when not in use