The Definitive Liss range is an integrated product system that promotes a definitive smoothing, an extra shiny effect and a lot of softness to the hair fiber. It is indicated to be used on wavy and frizzy hair with permanent effect. Indications: curly, frizzy and wavy hair. Do not apply to hair dyed with oxygen of more than 20 volumes. Wait a minimum of 30 days before carrying out new application tests and wait at least 2 weeks for a new application. Do not apply to hair treated with henna, magnesium, soda, guanidine, lithium or other metallic bases. The condition of the hair, quality and porosity must be checked to know if the product is suitable for the application. In any case, to be straightened the hair must be healthy and in perfect condition. If the hair is badly damaged, weak or broken, better do a keratin treatment Legal warning Attention: kit for professional hairdressing use, its improper or incorrect use may cause its effects not to be as expected, it is very important to follow the instructions to the letter and not skip any step.