Piedmont Yarn & Apparel is a brick-and-mortar yarn shop in Oakland, California, that supplies materials for crocheting, knitting, felting and spinning projects. Their staff has over 100 years of combined experience in textile arts, and will gladly help you with ideas and solutions that your projects need.  They sell a varieity of yarn, from acrylic to cashmere, as well as needles and other notions.