Recycled by Lanas Katia.It is a filled cotton, with tubular effect. Composition 74% Organic Cotton, 26% Polyester recycled.It is woven with needles of 4 to 4.5 mm. Crochet 3,5 - 4 mm. Each ball has 50 grams and 140 meters.To make a size 42 short sleeve jersey you need 7 balls. Machine washable at 30 degrees.