These solar pool mats warm up the pool while keeping heating costs down! Twist-and-fold easy store spring technology in easy-to-use solar panels. The solar mats feature attractive styling that coordinates with most backyard décor. This new and unique product is easy to put on and easy to take off. ThermaSpring Solar Mats are safer than standard solar covers if someone falls into the pool because of the room between them to swim out. Each Sun ring is approximately 65.5-Inches Long by 37.5-Inches wide. 70-80% of pool coverage is all that is needed for efficient thermal heating and retention. The ThermaSpring Solar Mats use the sun's free energy to increase your pool or spa temperature by an average of 10-15 degrees. One per pack. Heat up your pool so you can enjoy time with your family and play with your favorite pool toys!