Polywoven canvas. The fabric of the sandbox covers is not waterproof, but it keeps out debris
and animals. The fabric is light-weight and semi-transparent.
These light-weight sandbox covers are easily removed by hand. When kids are playing,
you can fold the cover up or simply put it aside.
The sandbox cover has two ties that you can use to secure the cover to the base of
the same company that manufactures some of the plastic
timbers that we recommend for use as playground sandboxes and playground borders.