The cross section of hemp fiber is more complex than that of ramie, flax, cotton and wool. It is irregular triangle, hexagon, oblate circle, waist circle, etc. The middle cavity and shape are different, and its molecular structure is prismatic, loose and spiral. Therefore, hemp fiber has a good dissipation effect on sound waves and light waves, and it can block strong ultraviolet radiation without special finishing

Cannabis is one of the earliest fibers cut and used in the world. There are two types of hemp in China: early maturity and late maturity. The quality of early maturity fiber is excellent, such as linear hemp, while that of late maturity fiber is coarse and hard, such as kui hemp and kangzhou hemp.