Set of 4 Outdoor Chair Seat Cushion - Sunbrella Fabric (Black #5408) with Zipper Set of 4 Seat Cushions - black (Sunbrella #5408) with Zipper Approximately 19.5" (wide) x 19" (deep) x 3" (thick) each cushion Shell - Sunbrella Fabric resists stains, mold, mildew and fading. Color stays strong and vibrant w/ UV and all weathers protection. 100% Solution Dyed Acrylic. Fill Material : 70% Polyester Fibers + 30% Urethane Foam - packed as pillow insert Reversible, Tied to secure, Cover w/ zipper. Poly/Form filled pillow Insert can be remove from cover for cleaning purpose.