HEAVY DUTY: Tarp is 11-12 Mil thick, Fabric weighs 6 oz. per square yard PERFECT FOR USE IN ALL WEATHER: Made of polyethylene and UV treated, Waterproof, Mildew, Acid and Tear resistant. Great for use in direct sunlight, rain, snow and more EASY TO TIE DOWN: Rustproof aluminum grommets approximately every 18 inches and at the corners SUNBLOCK: This tarp blocks 100 percent of the sun rays. Great for providing shade on decks, patios, or anywhere shade is required Finished Size