Prevents curls, kinks and waves up to 6 weeks (with weekly use after each time you shampoo and condition your hair) in-between relaxing. Reduces use of daily heat frizz control, locks in shine. Humidity block technology. Styling aid best recommended for: relaxed hair; use with a blow-dryer; use every time you shampoo and condition. Dark and Lovely Anti-Reversion Cream Serum is our first styling product specifically developed for relaxed hair to prevent reversion and lock in shine. Our innovative humidity block technology helps eliminate curls, kinks and waves to better preserve straight, smooth hair up to 6 weeks in-between relaxing. It is designed to smooth hair and control frizz while keeping it soft, full of body and manageable from one shampoo to the next. Suitable for use on relaxed and color-treated hair and all hair textures (fine, medium and coarse). Made in USA.