Save money heating your spa with a solar blanket. Made with thousands of air bubbles to capture the sun's energy, these covers convert the energy to heat and trap the heat in, effectively heating your spa for less. Available in several sizes and a full 15 mils thick, these spa solar covers can be cut to any size and shape to better cover your spa and prevent not just heat loss, but also water and chemical evaporation. Great for use in in-ground spas, these covers are lightweight and easy to take on and off. Their reinforced seams minimize wear and tear, providing you with many seasons of use.