Mauritzon canvas tarps are made with 100% cotton. Made in the USA, canvas tarps are cut, stitched, hemmed and sewn at the time of order. You can choose olive drab, brown, green, tan, white, or blue in a multitude of sizes. The finished size includes grommets in 24" standard spacing. Mauritzon Tarps are treated with a petroleum-based wax water repellant but they are not water-proof. They are tear and mildews resistant. The cotton duct fabric has double-stitched seams and hems.