Guest mattress slides easily out on seperate base with castors when required guest mattress raises up to same height as the main bed lockable legs keep the guest bed firmly in place use as 2 single beds or push togather to make a double bed please note that the mattresses may not be exactly the same height mattress specification stress free outer fabric tufted design layers of fillings providing support a combination of high density foam fillings and a 135 gauge open coil spring system g