This yarn can be used interchangeably with Briggs & Little Heritage, as it knits to 17 stitches over 4". With an 80% wool, 20% nylon mix, Tuffy is an excellent choice for work socks. Don't worry... this yarn softens considerably with washing.
Please note: Briggs & Little doesn't use an acid bath for their yarns, so you might notice small amounts of vegetable matter while knitting.
4oz/113g, 196m/215 yards
17st over 4" (10cm) on 5mm needles