Gamma from Katia is a colorful blended wool. It consists of: 52% merino wool and 48% polyamide. Each ball contains 50 grams and 110 meters. Knitting needles 6 to 7 mm and crochet 5.5 - 6 mm. To knit a sweater size 42 long-sleeved need eight balls. We recommend washing by hand.