I am very pleased with the solar cover. Finally a tarpaulin with no holes in the middle .So remains rainwater outside and not in the pool. The water temperature is also higher. I have the 4:57 m chosen for my 3,50 m pool. Have bent to the steel wall, a 10 m rubber band. So I can not cover the pool with use of the large tarpaulin because it is larger and the elastic band secured against wind and rain.