Wool is produced by shearing sheep, carding and spinning.  There is a natural wave in each fiber, called crimp, which makes spinning easier and helps the fibers attach to each other.  This creates greater bulk than other natural textiles and holds air which the helps retain heat.  It also impedes heat transfer in general and is used insulation in some instances.  Sitting on a wool sofa will mitigate the heat in the room.  It also retains water well, and ignites at a higher heat than other fibers and has a lower rate of heat release and is self-extinguishing.  Therefore it is specified in carpet for trains and aircraft. 

Merino wool has a long story to tell from its beginnings in Spain to its dominance today in Australia.  The wool mills in East Anglia shipped wool fabric to the French ports in Calais and made England wealthy.  Marino wool is the finest wool in the world because it is longer and finer than wool from sheep that are raised for meat.

Wool is used in the finest upholstery, rugs and carpet. The fiber has a resiliency that other fibers do not have because it holds air. Wool also resists dirt like no other fiber, so you can sit on that white sofa without fear of leaving a smudge.

Wool-like fibers are also used in clothing and upholstery.  Cashmere is from Kashmir goats and softer.  Pashmina is also from Kashmir goats, but only from the softest parts.  Camel hair is also used, as well as Alpaca.  Sitting on an Alpaca upholstered sofa or chair is a treat you should experience.