Shiseido Crystallizing Straight is an innovative new technique developed by Shiseido Professional in Japan to make frizzy, curly or wavy hair to be completely straight while preserving the health of hair. Typically improves hair's feel, softness and shine while making it more manageable.This 2 step straight permanent system contains a H1 STRAIGHTENER and H2 NEUTRALIZER, which are permanent solutions that are used with a hot hair iron to make your hair smooth, shinny and straight.