Our durable 7 ft. x 8 ft. Solar Spa and Hot Tub Blanket can warm your spa this year by up to 15°F. This blanket is made to give you maximum heating properties, reduce water evaporation, and keep heat loss to a minimum. This 12-mil floating blanket is loaded with thermal bubbles that retain heat at night and on cool cloudy days. The transparent blue color allows the maximum amount of solar rays to reach your spa or hot tub for optimal heating. All of our blankets are chemical and UV resistant so they last and last. The 7 ft. x 8 ft. blanket can be cut to match the shape of your spa interior. Warm up your spa or hot tub this season with our Solar Spa and Hot Tub Blanket.