Lay-Z-Spa EnergySense Round Thermal Cover 1.96 m x 71 cm Compatible with round spas up to 1.96 m x 71 cm Insulates your spa with a double layer of thermal protection, making it 40% more energy-efficient DuraPlus waterproof surface material is tough and resistant to weather and regular use Includes zippered opening for built-in pump or connection to external pump Contents: 1 thermal spa cover Increases the energy efficiency of the spa DuraPlus waterproof surface material increases the durability of the cover Zip opening for built-in pump or external pump connection Compatible with round spas up to 1.96 m x 71 cm Contents: 1 thermal cover