King Cole Zig Zag 4 Ply 4811 Butterfly Colourful self-striping sock yarn from King Cole. Machine washable and can be tumble dried. One ball will make one pair of socks. FIBRE CONTENT: 75% Superwash Wool 25% Nylon SKEIN LENGTH: 420m (460yds) per 100g ball RECOMMENDED NEEDLE SIZE: 3.25mm (UK 10 / US 3) TENSION: 36 sts x 28 rows in 10cm (4in)