Vinyl Pond Liner 20 oz. 22 mil Heavy Duty White Tarp (20' x 20') 20 oz. per sq. yd. - 22 mil thickness 3-ply coated vinyl, UV protected, Anti-mildew, Tear-resistant 100% waterproof, fish-safe, great for ponds of all kinds White on both sides, both sides are UV protected Does not come with grommets or pipe sleeves/pole pockets