20×40 ft. 20 oz. per sq. yd. coated PVC vinyl, 22 mil, waterproof, UV protected, tear resistant. Edges are trimmed – no pipe sleeves/pole pockets. Black on both sides. Super heavy-duty material, perfect for pond lining and a variety of applications. Fish and plant safe. Rip-stop layer in the center prevents tearing or fraying. Just as strong as EPDM, but easier to work with and less expensive.