A fighter of frizz and tamer of flyaways. What it does: This product does exactly what it says-and a little more. Defrizz works in any weather to control curls, frizz, and flyaway hair. It smooths and tames, leaving hair shiny and amazingly soft. What else you need to know: A friend to finer hair that can't quite hold heavy oils or waxes, this product can be used any time: after Prep or Tonic Lotion, before, during, and after styling.