Brand New 77" Round Inflatable Hot Tub Thermal Cover, Full Coverage Hot Tub Insulated Cover with Insulation Layer and Plush Lining, Suitable for Dia 77 Inch Round Spa (Black) There has a high-quality insulation aluminum foil layer and plush lining on the hot tub cover,which can perfectly isolate the external temperature,minimize heat loss to the greatest extent possible,save you a lot of electricity. Size is 77"DIA x 27"H.Suitable for multiple brands hot tub.Please note that:Cover only,without hot tub. Our spa hot tub cover made of heavy duty 600D oxford cloth and plush fabric and insulation aluminum foil layer,with waterproof coating,which is waterproof,UV-resistant,tear-resistant,etc.It can prevent your hot tub,UV,dirt,moisture,etc,make it always look like new,and extend the service life of the machine.