The Standard 20” Outdoor Seat Cushion from Polywood features fabric ties at the back, giving it a simple, artisanal, modern attachment that secures to most outdoor seating. Hand-sewn with performance fabric, the cushion resists moisture, salt, sun, mold, and mildew, holding up well to coastal conditions. Filled with foam and polyester fiber, it offers a soft, supportive feel that cleans easily with soap and water.