Lang Yarns Super Soxx 6-Ply is a yarn suited for socks and sweaters composed of 75% virgin wool and 25% nylon to strengthen the wool.
It knits with knitting needles 3 and 4 mm (US -6 / UK 11-8) for a gauge of 22 stitches and 33 rows for a 10 cm (4") swatch.
In a 150 gram (5.29 oz) ball there are about 410 meters (448 yd) so to knit a long-sleeved sweater for women size M (38 / 40) you need about 4 balls (5 balls for men size M, 3 balls for children 10 yrs and 1 for socks).
Machine wash on a wool cycle at 40°C (104°F) with detergent for wool without softener.