Felted wool is 100% wool yardage which has been shrunk to have the properties of felt; that is, it can be cut without the edges fraying.
Yes, you can felt your own wool using soap, hot water and agitating 100% wool until you have achieved the desired amount of felting.
Crewel needles are the best since they are similar to tapestry needles offering large holes, which accommodate wool thread and perle cotton while they have a pointed tip which will easily pierce the fabric.
Yes! Wool felt works well for most of the designs and excellent on some. It is slightly harder to needle than felted wool but has considerably less fray.
Yes, you can use this material but since this fabric has a high concentration of plastic in its composition, be careful you do not melt the fabric onto your iron. Also, freezer paper adheres much more tightly to this material. Do not leave patterns on freezer paper for an extended period.
Felted wool is available at many fine quilt shops and embroidery shops.
Yes, you can shrink your own yardage in the washing machine and dry it on high heat.