28 ft. Round Micro Mesh Pool Winter Cover With Cover Clips Micro mesh pool cover traps the finest silt and debris preventing them from contaminating your pool Hems are stitched with heavy-duty U.V. treated polypropylene thread to resist rot Has a black underside to inhibit algae growth All pool covers come complete with heavy-duty vinyl coated cable and winch Includes 45 cover clips that secure cover to top rail, preventing wind from getting under the cover