Polyester Blend PREMIUM PATIO CUSHION: Fits in spaces designed for square/rectangle seat lounge cushion cover up to 25 inches W x 27 inches D x 5 inches H 1 YEAR LIMITED WARRANTY: We provide a One YEAR Limited Warranty on our Montlake FadeSafe Covers MONTLAKE FADESAFE FABRIC SYSTEM: Montlake FadeSafe fabric is a solution-dyed fabric that is resistant to fading; a water-resistant coating and backing resists stains and helps keep rain out; quilting adds an elegant touch to your seat COMFORTABLE CUSHION FOAM: 3-Layered seat foam is designed for comfort and support; outer layers of open-cell foam enclose a high density core that is resilient but conforms to your shape CONVENIENT CUSHION FEATURES: Adjustable belted hem with click-close straps keep your cushion where you want it; zippers lock and store in protective garages; bound interior seams provide strength demanding joints