This is my holy grail: Hask - Hask Straight Solution Hair Treatment

I use it of course as a heat protectant for the few times I straighten my hair, but its main role for me is as a styler. After washing my hair, I apply about a quarter-size amount over my leave-in and oil, and it leaves my curls well defined and moist. I can get up to 3-day hair with it.