The manufacturer has replied, all of our white poly tarps are constructed from 6-ounce, 12-millimeter thick polyethylene and contain a 14 x 14 mesh count, allowing for the right blend of coverage and breath-ability. By letting a small amount of air to pass through, these poly tarps will resist mildew, acid and mold buildup, helping keep your outdoor items completely clean and dry. They're also UV treated, so they protect your outdoor storage from harmful sun rays that can cause fading, cracking and warping. We carry everything from a 12-ounce white UV tarp that makes an excellent outdoor boat cover to a smaller, tear resistant white tarp that can be used to cover plants in the winter.
Emily - eCanopy Product Specialist
on October 6, 2015