100% WOOL yarn. Wrap yarn around your fingers 20 times and then slip it off and wrap the yarn around the middle of that circle you just made 20 more times. Pinch the beginnings of your yarn ball together and keep tightly wrapping! Tuck the end of the yarn to secure. Repeat for 3 more balls. Put the ball into the toe of a pair of pantyhose and secure it there with a piece of embroidery floss or acrylic yarn. Do NOT use wool yarn. Toss into the washer with hot water and then into the dryer (hot).