Thermal Spa BlanketsThermal Spa Blankets Hot tub floating, insulating spa blankets help protect the most vulnerable area of your cover from rising heat, chemical fumes and moisture while also helping to maintain your water temperature. Our Thermal spa blanket is an energy saver that should more than pay for itself in reduced energy costs and additional cover life. Perfect for all above ground and in ground spas and hot tubs. Thermal Spa Blanket Features: Reduces heat