Hard wearing 4 ply sock yarn from German company, BellaLana 50g/ 210m (you will need 2 balls for a pair of adult socks) 75% superwash virgin wool 25% polyamide Machine washable at 40 degrees Rec needle size: 2.50 - 3.00mm Gauge: 30sts x 42 rows = 10cm x 10cm