These valance tarps are made of heavy duty polyethylene. Featuring grommets approximately every 18", these are easy to install on your existing canopy. They are available in silver, tan, or white. The valance canopy tops provide extra protection from the rain by allowing the water to just slide over the flaps instead of getting in the interior of the structure, unlike the no-edge canopy tops offer slightly less coverage than the valance ones while still providing great protection from the elements. Installing the canopy cover is made simple using ball bungees that are elastic cords with a ball at the end that and then inserted through the grommets and looped around the poles.