Vinyl Tarp 15 oz. 17 Mil Heavy Duty White Waterproof PVC (17' x 20') 15 oz. per sq. yd. - 17 mil thickness 3-ply vinyl, UV protected, Anti-mildew, Tear-resistant 100% waterproof, fish-safe, both sides UV protected White on one side, mix of gray and white on other side Does not come with grommets or pipe sleeves/channels