The first time I used Klorane leave-in spray, it had me hooked! My hair used to be thick and unmanageable before Chemo, now it's THIN and fragile. Even with the first spray on my thin and falling out hair, I could tell the Klorane is JUST what I needed. I can spray it on my hair after I shampoo and condition it, and it doesn't leave "heaviness" or "oily" feeling that many leave-in conditioners tend to do my hair. I'm not sure if the Klorane even advertises this, but it's also helped my hair strengthen, shine ( no more of the dullness), and adding fullness to the areas that were thinning out.