The Axiom I Sleep Mattress is a sofa-bed specific memory foam mattress. Only made as 3 lbs. heavy and 1.5″ thick, this is still comfortable enough for a sofa bed. Plus, since it is a memory foam mattress, support by properly contouring the body is possible. Most sofa beds’ mattress do not do that.

If you have an existing sofa bed, the Axiom is supposedly of standard size and will fit it.

Used as a mattress topper, the Axiom is also of standard fit with any existing bed.

Via Homedecorators