A Sweater. I was under the misconception that the sweater must be 100% wool. Oh no. You can needle felt on any fabric. I’d had this thrifted cashmere sweater in my give-to-Goodwill pile because it was a little holey. Turns out you can felt-patch those holes. Wool Roving. I purchased mine at a workshop I attended a couple of years ago. I’ve made felted soaps and ornaments with it as well as this sweater. So, a little goes a long way. I wouldn’t buy it at your local craft store because it will be a rip off. I’d look into some online vendors. Needle Felting Tool. This I did pick up at the craft store. I bought one by the company Clover with three needles in it. They are sharp as a mother so be careful as you stab away on your sweater. A Sponge or Bristle Brush Block. Again, I snagged mine at the local craft joint. This is the cushion that you use under the punching of the needle. {read}