Our Valance tarps are a waterproof heavy duty poly tarp with an approximate 1' skirt around all four edges. They have grommets approximately every 18" o.c. and have a UV inhibitor in them to help last in the sun. These dress up a canopy structure, as well as provide more protection, directing the water to run to the outside of the canopy frame. Often these are used as replacement canopy tops.
If you have an existing structure and are replacing the cover on the canopy frame, please use these measuring instructions to get the correct size.