Sandbox Cover With Drawstring, Square Dust-proof Beach Sandbox Cover, Waterproof Sandpit Swimming Pool. The sandbox cover is made of 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 play areas from dust, sun, and rain. Constructed from durable, lightweight fabric, it provides both dustproof and waterproof functionality. The drawstring design ensures a secure fit over the sandbox, helping to keep contents clean and protected. Tear-resistant, weather-resistant, and breathable, the cover is easy to clean and built for extended use. Compact, foldable, and simple to install or remove, this high-quality weather cover saves space when not in use.