For years, I used another product of the same line. Now it no longer exists and tried to replace thermal Nectar. During all these years, I had permanent and tried to strengthen my hair to withstand the chemicals. Now I'm forced to abandon permanently but I DO TO HAVE NO MORE! and I believe it is through these Kérastase products. My hair is wavy and swollen. After shampooing, they are often a little flat, but as the days and Nectar thermal treatments, they take a lot of body. I use an amount equal to a pea, every morning on dry hair: I heat the product in my fingers and I apply it to the lengths. It seems miraculous. Do not use too much product at a time, not to weigh down the hair.