The Big Rock Supply Blue Tarp is your classic blue tarp. It is woven with polypropylene fibers in a vertical and horizontal pattern, this helps promote strength and durability. Features: 48 Sq. Ft. - 5000 Sq. Ft. 5-6 mil thickness, Special 10 x 8 weaving for added strength Tear resistant, reinforced patched corners Polypropylene rope in hem Aluminum, rust proof grommets every 3 feet Coating is water, mildew & rot resistant ...