This is all up which inflatable air lounger you buy and its specific design. Most loungers will stay inflated for 2-3 hours, but there are some that are advertised as lasting for up to 8 hours. It is important to note that if you are having to re-inflate your lounger every hour, it may have been damaged or the seal is broken. It is best to check to ensure there are no leaks and you properly sealed your lounger.