Unfortunately Sarah Tweed is being discontinued from the BC Garn line.
50% mulberry silk, 40% wool, 10% silk Bourette silk
191 yards (175 meters) / 50 gm hank
19 sts x 30 rows = 10cm
3.5 mm - 4mm needle
BC Garn Sarah Tweed combines the best of all worlds: Noble mulberry silk for a light sheen and softness, wool for elasticity, volume, and good thermal properties. The tweed-like tone-on-tone appearance results from the addition of 10% Bourette silk. The perfect year-round yarn with a striking tweed look..
Sarah Tweed has a dry feel and the typical smell of bourette silk - a natural product. The yarn is the perfect starting material for those who find mulberry silk "too cold" because it is smooth and somewhat slippery. An unusual wide range of needle sizes works with Sarah Tweed, as the high percentage of wool also fills looser stitch patterns.
While it looks to be a 5ply/sport weight yarn you can also knit it as a 8ply/DK yarn.