The classic and renowned sock yarn - Regia 4-ply. Four single yarns are twisted or 'plied' together to give you the ideal yarn weight for hand-knit socks. Gives long-lasting wear and great shape retention. Machine washable up to 40 C (100 F) and can be machine dried. Non-felting. 2 50g balls are enough to knit a pair of socks, up to (European) size 46. With a 10-year Regia guarantee. A wide range of colors for you to choose from.