If you're looking for a multipurpose poly tarp that also has full visibility, then the 20' x 40' heavy duty premium clear poly tarp from Tarp Surplus fits the bill. This three-ply, 14 mil polyethylene tarp is extremely durable and can withstand even Mother Nature's most extreme temperatures thanks to artic flexibility. It features a 14 x 14 mesh count, heat-sealed seams and reinforced plastic corners. Our sturdy tarps are water and rot proof as well as tear-resistant. They are also UV treated, offering protection from the sun's damaging rays. Grommets are placed every 36" to allow for an easy tie-down. Clear poly tarps make an excellent choice for greenhouses and patio enclosures. If you're covering an exact area, please make sure to measure before ordering. Finished tarps arrive slightly smaller. The finished size for the 20' x 40' premium clear poly tarp is 19'6" x 39'6".