Keratin hair mask is a product of the first necessity for brittle, dry, porous, fluffy and tired hair, exhausted by frequent lightening coloring and heat-laying. It contains the structural protein keratin, which is related to the one that makes up the human hair cortex. Easy to use hair mask, this amazing product is not only the best keratin treatment you have ever tried, but also very easy to use. It only takes a few minutes to enjoy the full benefits of this quality treatment for damaged hair.