Throw Pillows Pillow Covers Indoor Outdoor Pillows Nautical Decor Chevron Blue 18" Polyester One decorative pillow cover. Also available with removable pillow insert. Pillow cover fabric is treated for outdoor use. Washable. 100% polyester. Polyester 18 x 18 square pillow cover. Fabric by the yard also available. Use for decorative throw pillows on couch or sofa indoors or as patio cushions. Made in USA by Decorative Things. Affordable home decor with decorator style.