Our brushes are made from cruelty-free goat, sable, and pony hair. The only exceptions are the Maximum Coverage Brush and the Brow Brush which are synthetic.

Brushes should be cleaned regularly because the oils from your skin can accumulate on the brush and interfere with proper application. Once a week is best. Those with oily skin will need to cleanse brushes more often. You can adjust how often depending on your skin type. We now offer a professional-grade brush cleanser, Sweep It Off, that is a quick-drying spray to make cleaning brushes easier.
http://www.purminerals.com/Sweep-It-Off-Brush-Cleane

The brushes have Pur Minerals and the type of brush (i.e., Powder, Utility, etc.) on them.