Thermohair is the original maker of mohair socks in North America. Produced in Ontario, Canada since 1992, the socks are made of 75/25 kid mohair/nylon yarn. Kid mohair, from Angora goats, is hair sheared from the kids, during their first year of life. ***The goats are not harmed in this process.*** It is the finest, softest, most luxurious of the mohair grades. Only 1 million pounds of this grade of fibre is produced worldwide per year, and is called the "diamond" fibre because of its strength and rarity. The therapeutic version lacks the 2 inches of elastic around the cuff for those who prefer nothing binding around the leg. These are often chosen by diabetics, or people with heart and blood circulation problems.