Mohair 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 luster and sheen, which has helped give it the nickname the "Diamond Fiber", and is often used in fiber blends to add these qualities to a textile. 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 and crease resistant. It is considered to be a luxury fiber, 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 is a very soft yarn when compared with other natural and synthetic fibers. Due to mohair lacking prominent, protruding scales along the hair's surface, it is often blended with wool or alpaca. Blending the heavily scaled wool helps the smooth mohair fibers hold their shape and stick together when spun into yarn. Mohair is also valued for certain other unique characteristics: it is warmer than other fibers, even when used to make a light-weight garment, and is often blended with wool for this reason; and mohair fibers have a distinctive luster created by the way they reflect light. Combined with mohair's ability to absorb dyes exceptionally well, pure mohair yarns are usually recognizable for their vivid saturated colors.