The heavy duty tarp is made to protect your inflatable and will last you for multiple rentals unlike the standard poly tarp. This heavy duty tarp is made from the same material as the inflatables and is stitched with double stitching. Another advantage of these tarps is that if they are ever torn or damaged we can repair them. We make two sizes, one for bounce houses and one for larger units like combos and waterslides. Invest in good quality materials and save yourself money in the long run.