Bulky rainbow shades! Schachenmayr Boston is a fabulous bulky weight yarn that knits on 7-8mm needles for any bulky weight project! Hats, scarves, bulky sweaters and cozy cardigans! 70% acrylic, 30% wool, Schachenmayr Boston is machine washable and has brilliant stitch definition - a great choice for any bulky pattern. 1.7 Oz per ball.