By 16aaygh. Futon. At Friday, August 10th 2018, 04:20:50 AM.
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. The other issue with the hollow bars is that if enough weight was placed on a spot they would begin to bend. The issue became so bad that a 90 day warranty was put in place by most manufacturers of these frames.
Futon mattresses are a whole other ball game. Do you want something soft, firm, or in between? What are the pro's and con's to natural fibers vs. foams? How long should my futon mattress last? Feel is a rather subjective term; someone's firm could be too soft for another. As a general rule of thumb, my customers like a firm futon for sleeping, a soft futon for sitting, and in between mattress for a sofa that converts into a guest bed. Foam futons usually retain the firmness they have when purchased, but only if the foam is of an acceptable quality. Look for foam that has a density no less than 1.2 pound per cubic foot. With foam, higher density usually equals a long lasting mattress that retains it feel. Natural fibers, mostly cotton, are good for futons that need more flexibility. For those of us that are traditionalist's a natural fiber and foam blend is a good choice when looking at a futon mattress.
Natural fibers, cotton and linen are nice and soft to begin with, but can wear faster than synthetics. Synthetic fibers; polyester, nylon, rayon and such; might not be quite as soft but they last longer than natural fibers. Synthetic fibers have come a long way, they are constantly being improved and they hold vivid dyes that cotton and linen can't. A good compromise between Natural and Synthetic fibers is blends of the two, which are in abundance in the futon cover market.