Keep the heat in and save energy with the Lay-Z-Spa 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 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. The Lay-Z-Spa will help you save money on energy costs by keeping your spa at a steady, toasty temperature. Lay-Z-Spa