"This 4-piece set of outdoor seat cushions adds plush relaxation in your garden or on the porch. Each has an interior insert made from foam for just the right amount of support. The square design features an acrylic Sunbrella fabric cover with piped edges that's removable with a quick zip for easy cleaning. Plus, each cushion has ties for attaching to your chairs (sold separately). We love that this upholstery is specially created to be resistant to weather, UV/fading, and stains for holding up to everyday use. Make sure to measure your chairs when selecting a size (based on availability).