One of the most obvious differences between futons is the mattress size and thickness. Futon mattresses may be the size of a chair, or a twin, full, queen or even king bed. The thickness of a futon mattress usually is directly related to its price.
The mattress of a futon may be constructed of cotton, polyester, foam, wool, an innerspring mattress or a combination of two or more materials. Cotton and innerspring futon mattresses typically provide the most comfort, but also come with a higher price tag.
The frame of a futon may be metal, wood or a combination of both. Futon frames also may include features, such as magazine racks, cup holders and arm rests.