After a hard day’s work, you would want to get refreshed and relieved from all the stress naturally. So you change your office clothes to your swimming attire and take a dip at your swimming pool, but unfortunately, the water is too cold and deters you to swim.
But fret not, now you can swim in the pool even in the coolness of the night, with solar sun rings, a passive solar swimming pool heating device which is designed as an insulating blanket to retain heat gained during daytime. So a dip in the pool at nighttime will now be more relaxing and enjoyable.