After reading reviews on this pool we were a bit wary as many commented on it going flat on its first use, and that's is exactly what happened. The bottom chamber repeatedly went flat within 48 hours. MightyApe were great about arranging the return as a faulty item, but the disappointment caused, the hassle of re-inflating & refilling the pool to try it again, and then the greater hassle of trying to dry & repackage it to return it makes me say don't bother with this model.