Boar bristle brushes have been used since ancient times because boar bristles have been found to be most suitable for combing hair without the hair being torn or damaged. At the same time, there is an even transfer of human sebum from the upper part of the hair to medium lengths or to the ends, thus smoothing the hair and giving the hair a natural shine. Boar bristles also reduce frizz because sebum protects hair from moisture, which is the biggest culprit of frizz. Thanks to the natural sebum, the hair is also protected from electric charge, so it does not fly. Boar bristles should only be used on dry hair, otherwise the bristles do not carry oil properly through the hair.