Milk wool? Yes, you heard correctly. Yarns made from milk. Biosynthetic fibres. Milk yarn sports a superb lustre, has a luxurious feel like silk and combines some of the great properties of natural fibres with benefits of synthetics. Milk yarn produces a string fibre that is eco-friendly (2 litres of water to produce a kilo of milk yarn instead of the 22,000 litres of water to produce a kilo of cotton) and feels great on the skin. And it's non allergenic.