It smooths even the most unmanageable hair. It contains natural hydrolysed keratin, for this reason it gently and carefully repairs the hair, gives it natural shine and silkiness. Glyoxylic acid in the composition makes the straightening procedure safe. Hair is easy to comb, style and do not become fluffy up to three months. Keratin System gently straightens the hair structure, deeply moisturizes and nourishes the hair. Does not contain formaldehyde.