The fabric of this kind of jeans is called tannin, and the red ears are simply the way of denim wrapping, which belongs to an integral part of the fabric. It is slowly and directly woven on the edge of the fabric with the traditional ancient shuttle loom, which is very time-consuming and laborious. Its function is to prevent the edge of denim fabric from loosening and increase the aesthetics. At the same time, it also shows its exquisite craftsmanship and high quality, which is difficult to be achieved by the general industrialized mass production machines, while the edge of conventional denim has burrs. Red-ear denim jeans are usually made of high-quality cotton and denim woven by old shuttle looms, which are durable and comfortable to wear.