Dual-Purpose Beds:
Dual-purpose beds, of which sofa beds and futons are the most common, are distinguished by their ability to
transform from a sitting surface to a sleeping surface, making them an ideal sleeping accommodation for
guests. Due to their need to fold and collapse, futons and sofa beds require different types of mattresses with
unique, flexible construction. Such mattresses are typically sold together with their respective frames to ensure
that the units function properly.
