Laluz Waterproof Picnic Blanket Tote(57"78") Stylish and compact when folded,Measures 57 by 78 inches when open The handy shoulder strap allows for easy transport Moistureproof waterproof and sand Proof: the material is waterproof,so it is great using on grass whether the ground is damp or not. It's also good in sand condition for it's easy to shake off the sand Great for picnics, outdoor concerts, star gazing or as a car blanket The picnic blanket can be washed by hand or by machine.Do not dry it directly, we suggest sun-drying, it would be better for its material maintenance.?