This solar pool cover sits directly on the water surface, within the pool麓s edges, and can raise the temperature of your pool water by up to 1掳C, depending on the amount of direct sunshine. With PE air chambers all over its surface, it has excellent heat-retaining properties. It is the least expensive way to heat your swimming pool. At the same time, it helps reduce the use of chemicals, as well as water evaporation. Being lightweight, installing and handling are very easy. Colour: Blue Material: Thick PE film with air chambers Dimensions: 1000 x 600 cm (L x W)