The Solar Pool Heating Mat by Bestway heats up pools the environmentally friendly way. The mat can raise the temperature of swimming pool water by 3-5 degrees C, providing comfortable and pleasant swimming conditions. Great value, it is as economical as it is effective. Suitable for all above ground pools and those with a 9,462 litre/2,500 gallon filter pump and 7,570 litre/2,000 gallon sand filter.