PRICES MAY VARY. Pack of 2: This set includes 2 pillow covers, each measuring 18x18 inches. Ideal for use with 20-inch pillow inserts for a fuller look. Pillow inserts are NOT included. Premium Waterproof Fabric: Made of durable, 100% polyester, these pillow covers are designed to be water resistant. They’re perfect for protecting your pillows from spills and moisture, whether used indoors or outdoors. Smooth Anti-Slip Zipper: The zipper glides smoothly and is designed to stay in place, with a d