Enhance your inflatable hot tub's energy efficiency with the Lay-Z-Spa EnergySense Thermal Hot Tub Cover. This cover can potentially reduce energy costs by up to 40% thanks to its double layer of insulation, which helps retain heat and allows water to heat up more quickly. Constructed from durable, three-ply DuraPlus material, it is UV-resistant, water-repellent, and built to withstand the elements. The cover features double-stitched seams for added strength and improved impermeability. A thick internal layer of insulating cotton and an anti-mildew-treated interior minimize heat loss. Safety lock clips and an adjustable strap ensure a snug and secure fit, even in windy conditions. It includes a zippered door for built-in pumps and can be removed to accommodate external pumps. This cover is compatible with round hot tubs up to 180cm x 66cm (71" x 26").