A lateral sleeper is a sofa bed that, after folding out, turns into a bed that can be slept on lengthwise. This is useful when the bed is used by just one person. There is no need to fold out the whole bed. In most cases removing the cushions suffices.
Lateral sleepers are often furnished with cold foam mattresses, spring mattresses or pocket spring mattresses with a sturdy slatted bed base base. A large number of lateral sleepers has a large storage space. Because of the simplicity of the mechanism it usually remains in good working order for a very long time, depending on usage and choice of fabric.
Mattress options: Cold foam mattress, spring mattress and pocket spring mattress.
Underlayment: Slatted bed base.