Hammocks, swings, and pillows are 100% polyester, but they feel like natural cotton. Our products can be used indoors or outdoors and are mildew and fade resistant. Pillows with printed designs are 19"x24" and striped pillows used for the swing bottom are 18"x18". Pillow inserts are 100% polyester fill and the removable cover is washable. Simply remove the insert, zip up the cover, and wash.