This is one of my most commonly asked questions, and something that most string players don’t know much about, other than possibly that their bow hair comes from either Mongolia or Siberia. Most all of the finest horse hair used for rehairing the bows of the string family will originate from Mongolia and Siberia, with some good hair (and some specialty colors) will also come from Argentina and Canada. As most are aware, the finest horse hair is used for rehairing bows, and this requires a high degree of hands-on sorting that must be done by hand, and in turn a high price for the finest bow hair. While this video link is not from my distributor of horse hair, it gives an outstanding picture of all the labor that is required to give us the hair for our bows.