Spa CoverSaver is designed to float on the surface of the water in your spa. The CoverSaver protects your expensive spa cover from the chemicals in your spa water, extending cover life. At the same time it reduces water evaporation and the loss of spa chemicals. The CoverSaver works with your main cover to limit heat loss, saving expensive energy. Our Spa CoverSaver can reduce heat loss by up to 80%, compared to an uncovered spa.