This Solid Royal Blue Futon Cover is 100% washable polyester, and like all polyester futon covers no ironing is needed. These futon covers are an economical way to protect your futon mattress in a variety of colors that can match any home or decor. Poly Poplin is a thin, polyester yarn used to make our polyester futon covers. These futon covers are wrinkle-resistant and retains their shape with ‘wash-and-wear’ properties.