Still the choice of those who may need to make a spare bed available to a guest with no or short notice, the sofa bed is typically larger than a settee (which seats two), although some designs now come in ‘chair sized’. Designs vary on sofa beds from those that simply slide or those where the backs fold down. Some sofa beds are extremely heavy and often are complicated to operate. Having enough internal space to hold bedding, store pillows and hold the mattress/spring combination often make these beds heavy and unwieldy. The sofa bed today however can even be purchased as a completely inflatable unit! Sofa beds come in a variety of prices, styles and comfort levels. If you know you’re going to need additional space for a guest it is strongly recommended that you go the extra mile and buy the higher quality sofa bed as it will last longer than some of the less expensive models. On the other hand if you’re only going to use this bed very rarely, a less expensive model may be equally appropriate.