That’s the thickest on this list, equal to the West Elm sofa bed below. It’s still not as thick as a regular mattress (those tend to be around 20cm), but noticeably comfier than other sofa bed ...

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 ...