Sandbox Cover With Drawstring, Square Dust-proof Beach Sandbox Cover, Waterproof Sandpit Swimming Pool. The sandbox cover is made of upgraded 420D polyester fabric with a waterproof PVC coating, offering enhanced thickness, durability, and long-term water resistance. Widely used as a protective cover for sandboxes, it is designed to shield children's toys and sand from dust, sunlight, and rain. Constructed from durable, lightweight fabric, it provides excellent dust and waterproof performance. The drawstring design ensures a secure fit over the sandbox, keeping contents protected. Tear-resistant, weatherproof, and breathable, the cover is easy to clean and built for extended use. Compact, foldable, and simple to install or remove, this high-quality cover saves space and offers convenient storage.