I have become obsessed with Living Proof Prime Style Extender. I can go 4 days before I have to wash and style my hair (I have long hair past my shoulders that I usually wear in a pony or clipped up). I wash my hair with sulfate free shampoo (currently Living Proof Volume Shampoo....but any sulfate free shampoo works for me), I don't use any conditioner at all in the shower because my hair doesn't do will with it...caused hair loss. That is why I can't use Wen. I use Aveeno's spray on, leave in, conditioner on my ends after my hair is towel dried, then I use a 50 cent size glob of LPPSE, distribute well, and blow dry. My hair has never looked this good and like I said, I can go 4 days before I need to wash it again, which has helped maintain my color. I will say that I don't use a lot of product on my hair when it is dry which would add to build up, but this stuff is amazing. 