Set of 4 Outdoor 20"x18" Chair Seat Cushion - Sunbrella Fabric (Brannon Redwood #5612) Set of 4 Chair Seat Cushions - Brannon Redwood (Sunbrella #5612) . Approx. 20" (wide) x 18" (deep) x 3" (thick) each cushion. Shell Fabric : 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 : 100% polyester fill. Fits various types of outdoor seating (Dining Chair or Rocker) : wrought iron, aluminum, resin, wicker, wood and much more. Sunbrella Fabric. Reversible, Fabric tied at the break to secure. Made is U.S.A