About This Product This outdoor seat cushion makes your favorite armchair even more inviting. Made from Sunbrella that's resistant to weather, water, UV rays, mildew, stains, and fading, this cushion features a square silhouette with two rounded corners that are made to fit snugly to the back of your chair. The 2.5” thick fiberfill insert features a zipper closure, making it easy to remove the covers. Best of all, it's easy to maintain – just spot-clean whenever it needs a refresh. Features This cushion has a 1.5-pound density and a 36 compression rating The capacity weight is about 500 lbs. Radius: 6"