This document classifies fibers into natural and manufactured types and further categorizes them by length and size. It discusses natural fibers like cotton, kapok, bast fibers including flax, jute, and ramie, and animal fibers such as silk, wool, and specialty hair fibers. Manufactured fibers include regenerated cellulosic fibers like viscose rayon and acetate, protein fibers like azlon and casein, mineral fibers like glass and ceramic, synthetic fibers like polyester and nylon, inorganic fibers, high performance fibers such as aramid and carbon, as well as rare eco-friendly fibers. The recycling process of PET bottles into staple fibers or chips is also outlined.