Pool Mate 3512-4PM Heavy-Duty Blue Winter Pool Cover for Round Above Ground Swimming Pools, 12-ft. Round Pool

This Robelle Heavy-Duty round solid winter cover features a 8 x 8 Scrim count (threads per square inch) and a material weight density of 2.36 ounces per square yard. The Imperial Blue topside has been treated to inhibit damaging ultraviolet rays. A black underside prevents the growth of algae. Made of polyethylene, this exceptional quality above ground winter pool cover has a 4-ft overlap, allowing the cover to be used on above ground pools with top rails up to 9 inches wide. There are 2 grommets approximately every 4 feet for the use of a cable to secure the winter cover. A plastic-coated cable and winch are included. It is designed for round above ground pool.