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. ARDEN Cushion Color: Black, Cushion Size: 2.5" H x 19" W x 18" D