Bouton d'Or Challenge knitting yarn is composed of 50% wool, 50% acrylic and knits with knitting needles 3-3,5 mm (US 3-4 / UK 8- 9) for a gauge of 23 et. and 30 rows.
In a 50g (1.75 oz) ball there are about 116 m (126 yd).
Machine wash at 30°C (86°F), low iron.