"Cotton consists of over 90% cellulose like other plant fibers, which is a polymer of glucose. Polymer is usually the same as synthetic fibers and plastics. Polymers are usually the same as synthetic fibers and plastics. Polymers of glucose are also known as polysaccharides. Structural polysaccharides are like cellulose. They both provide support for the organism, also many of the traits that make cotton come from the unique structure of cellulose. Cellulose can take up water, accounting for a good amount of absorbency of cotton and of cellulose based products. Another structural polysaccharide is chitin, which is a variation of cellulose."