Never imagined the sun year ago about 1 bought due to the positive reviews. It is true that it is (at first) taut. Nevertheless, I still have not so often used, the material has now given way clear so that I now lay in the middle of the metal rod. In addition, it is simply too narrow for me. I cut it myself constantly at the side of the metal braces. I am 190 cm tall and weigh 90 kg. Conclusion: for someone with my size absolutely uncomfortable and unsuitable. For children it may work.