Fibers or fibres (...) are materials that will continuously discrete elongated pieces, similar to pieces of thread. They can be spun into filaments, thread, or rope. They can be used as a component of composite materials. They can also bematted into sheets to make products such as paper or felt. Fibers are of two types: natural fiber which consists of animal and plant fibers, and man made fiber which consists of synthetic fibers and regenerated fibers. The earliest evidence for humans using fibers is the discovery of wool and dyed flax fibers found in a prehistoric cave in the Republic of Georgia that date back to 36,000 BP.