For Coarse or Resistant Hair (non-color treated hair) Make your hair smooth, shiny and straight. This two step straight permanent system contains a straightener and neutralizer, which are permanent solutions that are used with a hot hair iron. Crystallizing Straight is an innovative new technique developed by Shiseido Professional in Japan to make frizzy, curly or wavy hair completely straight while preserving the hair's health. Crystallizing Straight typically will improve the hair's feel, softness and shine while making it more manageable!