I thought this was interesting about the properties of wool:
Re-Discover Wool!
Wool is the most incredible and unique fiber in existence! Wool has been used by humans for thousands of years – you might say it was the very first renewable resource. The microscopic structure of wool has evolved over thousands of years, and no synthetic fibers can come close to replicating it.
The Superb Qualities of Wool
Wool is 100% natural
Wool can absorb moisture of almost one-third of its own weight, yet repels liquids. Wool releases the moisture evenly.
Wool regulates temperature – both heat and cold.
Wool resists dirt and stains.
Wool resists mildew and mold.
Wool is naturally flame-resistant – it smolders, rather than bursting into flames or melting.
Wool is durable and lasts a very, very long time, and when it has served its purpose, it is completely biodegradable.
Wool fibers are crimped, which provides natural buoyancy, elasticity, resiliency and loft to make naturally comforting products.
A sheep produces a fleece of wool each year – once it is sheared, the wool regrows – a very renewable resource!