These pins were created using wool, a zipper, recycled felted sweater (the black ring around the outer edge of the oval pin), glue, pin backs, embroidery thread, and transparent polyester thread. I'm considering using fine beading wire instead of the polyester thread, because as the thread comes off the spool it has a lot of spring making it difficult to sew aroung the zipper's teeth. These designs are those of Odile Gova of Ontario. She sells her pins under the name "Wooly Fabulous". Google her, her work is great.