Australian startup Koala began with a single product – the Koala Mattress ... s genuinely a Koala sofa bed for any space, and even the largest becomes a queen-sized bed in seconds.

Milliard 4.5-inch Memory Foam Replacement Mattress It doesn’t take much to improve upon the busted, old mattress—or the disappointing new one—lurking in your sofa bed. This is a great start.

Our top pick overall is the West Elm Shelter Queen Sofa, a highly customizable couch with a memory foam mattress that impressed us during testing. During our rigorous testing of the best couches ...