The most beneficial feature of air beds is the option to change and adjust firmness of the mattress on each side independently, thus provide customized support. This is accomplished by air chamber and electric pump operated with a remote. By pressing buttons on remote you will increase or decrease amount of air in the chamber and change overall firmness. With two independent chambers, it is possible to find desirable firmness on each side. It is invaluable for couples with opposite comfort preference or contrasting body weights. It is a matter of personal preference how often is the firmness setting changed, some people change it more frequently depending on their health or fatigue status or simply to relax. Others find it vital to have an option to change the setting over mattress’ lifespan to correspond the changes in their bodies and lifestyle.