subject: Using a Tarp Throughout Winter For Protection [print this page] This versatile cover has been gaining much popularity over the years and is replacing more expensive covers such as vinyl and canvas. The super heavy-duty poly tarp provides the same protection as other fabrics but is lightweight and affordable. Furthermore, the heavy-duty tarp is made of high density polyethylene, which is naturally resistant to mold, rot and mildew. The laminated surface will not wear off and the waterproofing characteristics do not need to be re-applied at a later date. These key factors have made the heavy-duty poly tarp the ideal cover for winter protection.