I'm sure you have seen felted berets and mitts. Here's how it works: you must use pure wool, and then knit loosely an object. In my case it was a beret which was really big. Then I gathered up a spatula, some natural soap, a bucket, gloves and the hat.
Fill the bucket halfway with the hottest water, add the bar of soap and the hat. Use gloves and the spatula as a stirring device and rub, stir, beat, and agitate the hat about 15 mintes. (At some point take the bar of soap out) Check out how the hat looks. It should'nt look like a knitted hat anymore but more like a fabric. If it still looks too big, repeat the hot water procedure.
The reason the felting happen is because wool has scales or barbs on it and when treated in the manner abouve they link together and make a tighter warmer and waterproof to a degree garment. Also it just looks cool.
Repeat the procedure until the garment you are making looks like what you want. Empty the bucket and clean it. Now fill it halfway with cold water and put the finished hat in, swish it around andd pull it out. Roll it in a towel, remove, shape and either put it in he dryer or allow to dry on a durface shaped like a head. In my case I used a vase that is perfect for this.
The cold water rinses as well as shocks thee fabric into stabilty.
Now you go try it!