Cotton, a seed fiber of the genus Gossypium in the Malvaceae family, is native to the subtropical region. Plant shrubby, grows to 6 m tall in tropical areas, usually 1 to 2 m. The flowers are milky white, turning dark red shortly after flowering and then fading, leaving behind small green capsules called bolls. Inside the boll are the seeds, and the hairs on the seeds grow up from the skin of the seeds and fill the interior of the boll. When the boll is ripe, it splits open to reveal the soft fibers. Fiber white or white with yellow, about 2 to 4 cm (0.75~1.5 inches) long, containing cellulose about 87~90%, water 5~8%, other substances 4~6%. According to the characteristics of cotton fiber can be divided into coarse cashmere cotton, long cashmere cotton, fine cashmere cotton 3 categories.Cotton, a seed fiber of the genus Gossypium in the Malvaceae family, is native to the subtropical region. Plant shrubby, grows to 6 m tall in tropical areas, usually 1 to 2 m. The flowers are milky white, turning dark red shortly after flowering and then fading, leaving behind small green capsules called bolls. Inside the boll are the seeds, and the hairs on the seeds grow up from the skin of the seeds and fill the interior of the boll. When the boll is ripe, it splits open to reveal the soft fibers. Fiber white or white with yellow, about 2 to 4 cm (0.75~1.5 inches) long, containing cellulose about 87~90%, water 5~8%, other substances 4~6%. According to the characteristics of cotton fiber can be divided into coarse cashmere cotton, long cashmere cotton, fine cashmere cotton 3 categories.