Futon Mattress Double SizeA futon that actually works as a bed, not just a couch. This double size futon mattress is built with enough firmness and fill to give overnight guests a genuinely comfortable sleep, while being flexible enough to fold with any standard futon frame. Available in Camouflage, Green, Black, Navy, and Burgundy. How a Futon Mattress Differs from a Regular Mattress A futon mattress is designed to do two things: support a person sitting on a sofa, and lie