Ever since J. Morgan Puett, we've had an odd attraction to felt. Soft, raw, sort of dumb, cheap, felt is the outcast of the textile world and finds its home with children or under the housing of a jet engine. We built the doors inside our house out of it, and we saw today that Tim used it in his bed to build a headboard (or to simply pad one)...
We've also seen it put to amazing use on interior walls in NYC due to the genius of the LTL, who use it everywhere in their interiors - particularly the bakery FLUFF above (now deceased). BTW, that's felt on edge lining the walls above.
We've used it for doors, headboards and even as an impromptu rug in our bedroom. The thick, juicy stuff feels just great under your feet and adds a surprising contrast to a typical interior. True, you can't wash it, but it IS very durable and with vacuuming it lasts nicely.
Felt comes in a lot of thicknesses, and in a broad range of colors if you are buying in the thinner range. The basic colors are grey and white, which has a very creamy, warm consistency.
Prices tend to vary and sheets are sold by the yard (it all comes off of a roll). The standard roll width is 72" and you can usually request any cuts you want for smaller pieces. You can cut it yourself with a sharp Exacto very easily.