Mohair /ˈmoʊhɛər/ is usually a silk-like fabric or yarn made from the hair of the Angora goat. Both durable and resilient, mohair is notable for its high lustre and sheen, which has helped give it the nickname the “Diamond Fibre”,and is often used in fibre blends to add these qualities to a textile. Mohair takes dye exceptionally well. Mohair is warm in winter as it has excellent insulating properties, while remaining cool in summer due to its moisture wicking properties. It is durable, naturally elastic, flame resistant, crease resistant, and does not felt. It is considered to be a luxury fibre, like cashmere, angora and silk, and is usually more expensive than most wool that comes from sheep.
Mohair is composed mostly of keratin, a protein found in the hair, wool, horns and skin of all mammals. While it has scales like wool, the scales are not fully developed, merely indicated. Thus, mohair does not felt as wool does.
Mohair fibre is approximately 25–45 microns in diameter. It increases in diameter with the age of the goat, growing along with the animal. Fine hair from younger animals is used for finer applications such as clothing, and the thicker hair from older animals is more often used for carpets and heavy fabrics intended for outerwear.