This Robelle premium round solid winter cover features a 14 x 14 Scrim count (threads per square inch) and a material weight density of 5.2 ounces per square yard. The Tan 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. The overall size of this cover is 32' Dia. It is designed for round above ground pool. All Robelle Premium winter pool covers come with a 20-year warranty.