Extend your hot tub season and save energy with a 8-ft x 8-ft Solar Blanket. This rectangular spa cover traps heat from the sun and effectively raises the temperature of your spa. Made out of 12-mil polymer, this blanket can increase water temperature up to 15 degrees Fahrenheit and out-performs comparable Intex spa and hot tub covers. The transparent blue color allows the maximum amount of the sun’s rays to reach your spa for optimal warming. Innovative thermal bubbles retain heat through cloudy days and cool summer nights. UV-protected and chemical resistant, our blankets are designed to withstand years of direct sunlight. Dimensions: 8-ft W x 8-ft L Comes with 90-day limited warranty. EXTENDS THE SEASON - This 12-mil solar blanket uses passive solar heating to increase the temperature of your hot tub up to 15 degrees Fahrenheit. SAVE ENERGY - The insulating thermal bubbles trap heat while the transparent blue color lets in maximum solar rays, making this cover energy-efficient all summer long. UV-RESISTANT - The rectangular 8-ft x 8-ft Spa Solar Cover is designed to withstand exposure to chemicals and UV radiation and will tolerate even the most intense sunlight. 90-DAY WARRANTY - Your product comes with a 90-day manufacturer warranty. Your item will arrive damage free with all necessary parts and accessories. If something goes wrong, we'll work tirelessly until you're satisfied with your product. DIMENSIONS - 8-ft W x 8-ft L