This Shells Beach Nautical Ocean Waterproof Outdoor Throw Pillow Cover is a 18x18 square cover featuring a traditional design with shells, starfish, and reef patterns in multiple colors. Made of 100% polyester, this water-resistant pillow cover is perfect for outdoor use on the patio or any room in the house. Easy to care for, it is machine washable and designed for outdoor use with hypoallergenic and stain-resistant features. The zip closure adds convenience for easy maintenance, making it suitable for teens, adults, and kids who love the beach and ocean theme.