"Our Roughneck premium grade black and silver tarp is built for the most extreme applications. Silver side is designed to reflect sunlight, while Black side prevents light from penetrating tarp. Polyethylene fabric has a tightly woven 14 x 14 strand per inch internal weave and is double laminated to form a waterproof, rot-resistant tarp that resists sun fading and cracking in cold weather. Heavy-duty 6-oz. per square yard material provides exceptional tensile strength and tear resistance. Made to actual finished size, compared to cheaper tarps that are cut to size, then folded at edges to yield a tarp that is smaller than stated size. Water Resistant Yes, Dimensions L x W ft. 20 x 30, Grommet Material Aluminum, Grommet Spacing ft. 2, Material Thickness oz. per Sq. yd. 6, UV Inhibitors Yes, Mildew Resistant Yes, Material Type Polyethylene. Provides superior durability and the best sun shielding capability Silver side reflects sunlight Black side prevents light penetration First layer is tightly woven 14 strands per inch x 14 strands per inch of polyethylene fiber Woven fabric has a double laminated coating of polyethylene, producing a durable weight of 6-oz. per sq. yd. Provides excellent tensile strength and tear resistance Tarp is waterproof, rot-resistant and resists cracking in cold weather Edges are heat-sealed and reinforced with rope for extra durability Weave and inner and outer coating contain UV inhibitors to give tarp the highest resistance to fading and degrading in sun Rustproof aluminum grommets every 2 feet to help secure tarp Made to actual finished size, compared to tarps that are cut to size, then folded at edges to yield a tarp that is smaller than stated size"