Futons.  Futons are an Asian invention.  They are normally made from multiple layers of fibre or cotton.  In the UK they are popular with younger people who are on a very tight budget as they are very affordable.  The mattresses can be used on the floor or a frame can be purchased to make it more of a bed. 

Hard Vs Soft Mattress.  Mattresses come in a wide range of solidity.  From the ultra soft to the extremely hard, it is more a matter of preference than necessity.  However, there are some basic truths that hold for the majority of us.  Very soft cloud-like mattresses can wreak havoc on bad backs.  This is because there is very little support in a soft mattress.  While hard mattresses might be better for a bad back, very hard mattresses can cause just as much trouble.  It all boils down to what works best for each individual. 

The twin mattress size can be a bit deceiving.  At 39 inches wide and 75 inches long, it is the smallest standard mattress size available.  You would have to go to a crib mattress size to find anything smaller.  But for the twin mattress size, there are still a number of uses for it.  Follow along for much more on this dynamic mattress size!  Twin Mattress Size: Uses and Information It could be a tight fit for most adults.  At 39" x 75", it is too short for those taller than 55", according to The Better Sleep Council - though adults in tight living quarters can make the jump to a twin XL (39" x 80").