Consumers whose style creation process involves straightening hair are frequently troubled by frizz. The cause of this predominantly relates to re-adsorption of moisture from the environment which leads to progressive reversion of the water-set. This occurrence is exacerbated by high humidity conditions.  If you want to show how your products are able to control hair frizz, then you might consider performing a frizz control test.  These experiments can also be used to investigate the humidity resistance of styling treatments.