Wool carpets or rugs can be used in high moisture areas, thus offering the best durability with elegance. Since wool can be easily dyed and has excellent piling quality, they are generally suited for rough and tough areas. Being a natural fiber, chances of allergies are highly reduced. Wool is the most favored material for the piles of oriental rugs and carpets. They often have cotton foundation but at times the weft may be of wool. Cotton foundation provides a better strength.