Ever since the domestication of sheep, humans have been using wool to help keep themselves warm. By some estimates, as far back as 34,000 B.C., people have enjoyed the luxurious fibers of the fabric, well before even the invention of the iron or sheers to sheer the wool. The production of the fabrics has changed somewhat over time; the wool of today is much more manageable and softer due to improved production techniques as compared to the ancient variety. However, relatively little has changed in the millenniums of wool. The basic elements are sheep, something to sheer them, forming yarn and a means to sew or weave. People have been using the material for clothing and wool rugs for a long time and still do so.