Not only do futons come with great steel metal frames but beautifully carved wooden frames also complement the many different sizes available in the market now. Most futons are made on a timber frame, typically pine, but many other funiture grade hardwoods are used to create a folding frame which doubles as a sofa or loveseat and as an occasional bed. Futons can also come in a single size which doubles as an arm chair. Steel is an ideal choice due to its exceptional durability. The earthy tone of brown makes it a favorite choice.