Chicago Canvas & Supply’s heavy canvas tarps are made to last! Our 16 oz heavy duty canvas tarps are made from breathable, 100% cotton. They are then treated with oil and wax to become water-repellent and mildew-resistant, making them well-equipped and durable enough for a wide range of outdoor uses under varying weather conditions. These tarps are not intended for cars (autos) or boats. CCS offers a large inventory of heavy duty canvas tarps with varying cut sizes and weights to suit your application! 16 oz. Colored Canvas Tarps are available in brown, gold, green, grey, white, and olive drab.