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.
It was soon discovered though that these frames were not such a bargain that they appeared to be. The first problem with black metal frames is the round metal bars that make up the seat and back sections of these frames. Where as wood futon frames are using flat slats, black metal frames have hollow round bars. Thinner mattresses would slide through the gaps between the round bars. On wood futons this was never a problem.
Replacing these parts were made more difficult by the fact the manufacturers were located overseas and obtaining the parts past the 90 day warranty period often involved the retailer having to purchase the replacement parts and charging the customer. If youre shopping for a futon, here are some things to think about if you see a black metal futon frame in a mass merchant or big box store. Consider the fact that most solid wood futon frames carry a warranty anywhere from a year to a lifetime warranty. Black metal futon frames have a 90 day warranty.
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