Keep the heat in and save energy with the Lay-Z-Spa EnergySense Thermal Spa Cover. This special spa cover is designed to insulate your spa with a double layer of heat protection, making it 40% more energy efficient. Featuring a DuraPlus waterproof surface material, this cover stands up to weather and regular use, and includes a zippered door for a built-in pump or an external pump connection. Compatible with round spas up to 1.80 m x 66 cm (71 in. x 26 in.), the Lay-Z-Spa EnergySense Thermal Spa Cover will help you save money on energy costs by keeping your spa at a steady, toasty temperature.