Add personality and comfort to your outdoor patio furniture with this outdoor seat cushion. Its polyester cover is water- and fade-resistant, so it holds up during rain or shine. We love that this chair pad comes in a variety of color options, so it's sure to fit your style. This square seat cushion is 21" x 21" with a 4" thick polyester foam padding. Plus, it has two ties in the back corners, keeping it from blowing away on windy days or sliding while you're seated. Product Details Furniture Type: Dining Chair Cushion Product Type: Seat Cushion Cushion Cover Material: Polyester/Polyester blend Durability: Water Resistant; UV Resistant; Fade Resistant Cushion Fill Material: Polyester Cushion Attachment Type: Cushion Ties Reversible: Yes Removable Cushion Cover: No