When folded, the bi-fold futon bed mattress has a wider seating area than does the tri-fold futon bed mattress. The bi-fold futon looks much more like a traditional sofa, whereas the tri-fold futon looks more like a two seat sofa. If space is very limited you may want to consider buying a tri-fold futon bed mattress, but if not, the bi-fold futon bed mattress usually looks far more pleasing to the eye.
However a futon bed mattress made from cotton and polyester is quite flexible. A futon mattress made from 100% polyester is by far the lightest of all; it also rates well for firmness and rigidity. A futon bed mattress made using inner springs is by far the heaviest and would only be used when the futon is almost always used as a bed. As you might expect, the rigidity of a futon mattress using inner springs is excellent.
Even with the best mattress on the market youll feel slats that are too thin, or to far apart. If you use a futon frame with substandard, unsupported slats you run the risk of ruining your mattress. Try to look for frames that feature mortise and tennon joinery and metal on metal connections, theyll only add to the life of your frame. Futon mattresses are a whole other ball game. Do you want something soft, firm, or in between?
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