horsehair

Fibers that are hair from the mane and tail, for the most part, of Canadian and Argentine horses. It is occasionally used for uphol­stery, but is more commonly used in interfacings for stiffening and strength. It is always combined with other fibers. True horsehair is rare and fabrics loosely called horsehair are often made from other hairs (such as goat) or man-made fibers.