Tarps Plus understands the need to bring quality and heavy duty poly tarps to its clients and we also understand how difficult it is to know which tarps are the heavy duty poly tarps and which ones are not. Tarps Plus now has a section where we list all the heavy duty tarps and the specifications on the heavy duty poly tarp. Our heavy duty poly tarps are more than 14 mil thickness, 7.0 oz per square yard, uv treated, waterproof, mildew proof, grommets every 18 inches. Our Heavy duty poly tarps come in many different colors and sizes, the #1 heavy duty poly tarp is the silver/black and white/grey combo poly tarp these tarps are the heaviest duty poly tarps available and its almost like having two poly tarps because of the thickness and the option of two colors in one tarp. We are also having a sale on our heavy duty tarps and we urge you to take advantage and and take a look at our heavy duty poly tarp section.