Natural fibers and fabrics consist of bulk fibers, yarns, or woven cloth manufactured from plant materials such as cotton, wool, linen (flax), sisal, jute, hemp or silk. Fiber is a class of hair-like materials that are continuous filaments or separated into discrete, elongated pieces like thread. They can be spun into filaments, thread, or rope. There are two main types of fibers: natural fibers and synthetic fibers. In addition, there are three basic types of natural fibers and fabrics: vegetable fibers, animal fibers, and mineral fibers. Vegetable fibers are made of cellulose from plants such as cotton, linen, jute, flax, ramie, sisal, and hemp. Animal fibers are collected from animals such as sheep. Mineral fibers are naturally-occurring fibers, or slightly modified fibers that are procured from minerals. The chemical structure of natural fiber depends upon the fiber’s type. Sources of natural fibers are an additional consideration.