By day, these floating mats draw heat into your pool or spa to warm the water. At night, they act as an insulator. Great for odd-shaped pools. For best results, cover 70-80% of the pool. Heavy-duty, UV-resistant vinyl. Spring frames easily twist and fold. What a cool pool solar panel!!
Price: US$26 (free delivery over 2 products ordered)
Order on Amazon : Therma Spring Solar Mats