Horsehair braid; a fabric made from horsehair, alone or in combination with another fibre; an artificial substitute for this.
Crin is a firm but flexible material used for stiffening clothes, upholstery, hat-making, etc. It is now frequently produced using a polyester filament substitute for horsehair..
Origin
Late 17th century. From French crin horsehair from classical Latin crīnis hair.