HEAVY DUTY: Tarp is 11-12 Mil thick, Fabric weighs 6 oz. per square yard UV treated Polyethylene, Waterproof, Mildew, Acid and Tear resistant. Great for use in direct sunlight, rain, snow and more Rustproof aluminum grommets approximately every 18 inches and at the corners TRANSLUCENT: Excellent for areas where you need light and protection from the elements CUT SIZE: Tarp will measure 6 inches or 3-5% shorter