Ukeen Pillow Forms Cushion Insert with Zipper Highly Durable & Comfy Outer Cover Shell, 18" L x 18" W, 1.1 lb(500g), 2 Piece Cover with zipper 100% polyester non-woven highly durable & comfy outer cover shell Fill: 100% polyester grade a hollow conjugated siliconized fiber fill 100% polyester, 500g (1.1 lbs) Size: 18 inch by 18 inch