I'm sure there are hundreds of wet-felting tutorials out there, but I took pictures of the process for something else, so I thought I might as well write a little description!http://evaberry.com/blog/wp-content/uploads/2007/07/dscn1894.JPG
Get a piece of wood or another solid object that's slightly bigger in every direction (wide, longer, thicker) than the object that you're making the pouch for (this is a GPS). Wrap the wood in clingfilm (saran wrap in US?) and then wrap approximately 4 layers of roving over and around it, leaving an opening at the top. I used 2 layers of white inside because the undyed roving is cheaper, then 2 layers of blue. Take care with the corners.
Carefully tuck the whole thing in the foot of a hideous old pair of tights you no longer want to keep.
Get some nice natural soap and hot water and start felting.
Once the felting process has started (the wool sticks together) carefully peel off the tights before the wool felts onto them.http://evaberry.com/blog/wp-content/uploads/2007/07/dscn1898.JPG
Keep felting, all over...http://evaberry.com/blog/wp-content/uploads/2007/07/dscn1899.JPG
Before it's completely felted, decide on a pattern. Gently needle-felt it on (you have to do it diagonally so as not to stick your needle into the wood). Needle-felting is not compulsory but it makes it easier because it keeps the pattern in place.http://evaberry.com/blog/wp-content/uploads/2007/07/dscn1900.JPG
Gently rub each part of the pattern separately with more soap and water until it stays properly in place.http://evaberry.com/blog/wp-content/uploads/2007/07/dscn1901.JPG
Then you can rub more roughly again. Make sure you do the underside, bottom and corners properly too.http://evaberry.com/blog/wp-content/uploads/2007/07/dscn1902.JPG
Once it's felted enough, slide your pouch off the block of wood and give it the hot/cold treatment: plunge it alternately into very hot and very cold water, squeezing it hard in all directions in each bath (about 30-60 seconds in each? and repeat as many times as necessary). This makes it shrink. Check now and then against the thing you want to put inside to see whether it's reaching the right size. Make sure you turn it all the time and squeeze from all directions so that it doesn't shrink more in one direction than another.
Once you reach the right size, stop and let it dry.http://evaberry.com/blog/wp-content/uploads/2007/07/dscn1919.JPG
Once dry, you can iron your pouch to get rid of the fuzziness (I didn't). Then make a felt bead (just by rubbing some roving with soap and water between your palms) and sew it on like a button. Sew some elastic to the other side...
And that's it!http://evaberry.com/blog/wp-content/uploads/2007/07/dscn1920.JPG