Loading... Please wait...4ply superwash yarn This yarn is self-patterning and produces a striking array of colour. One 100g ball is approximately 425m and is enough to make an adult size pair of socks, pair of gloves or scarf. Opal yarn is 75% superwash virgin wool/25% polyamide and it is machine washable at 40C. Recommended needle size is 2.5mm - 3mm