How To Felt
Felting kit (solar pool covering, polyester tule, pool noodle, rubber band or something to tie up the kit like a pair of old hose)
Soap container (tupperware, clear plastic sheets, kiss my face olive oil soap)
Wool roving (you can find this on etsy, amazon, at craft stores but a good source for merino is Mohairandmore.com)
How does felting work?
Wool fibers have tiny scales on them, visible through a microscope. These scales will open up and peel away from the fiber when wet. Soap is added to wet wool to allow the fibers to easily move around each other when agitated with the rolling mat or your hands. The fibers shift around each other and with the scales open, they begin to tangle and knit themselves together into a cohesive piece of fabric. The wool will shrink about 30% when felted. Felt is a very strong and versatile material!
Your wool will begin to shrink and feel pretty solid once it has turned to felt. This may take an hour or more depending on the size of your piece. Once the piece is fully felted, rinse your felt out in a sink until all the soap gone. If your rinse in hot water and throw your piece continuously against the sink, it will felt further. If you do not wish your piece to shrink anymore, rinse in cold water and do not toss the wool.