"-Made of 100% polyester fiber filler without odors or allergens retardants, mercury, lead, and other heavy metals. -Pillow insert size:20"" x 20"", 51cm x 51cm.Pillow cover a little bit smaller than 20x20in may reach the best performance of the insert. easy to clean and dry:Machine washable.Please wash It in gentle cycle with warm water and hang It up to dry. Cotton fabric and tight stitching provide ultra toughness THE insert stay intact during daily use."