NexxuSphere Technology. Time released nutrients. Nexxus Sleek Memory Straightening Smoothing Spray helps your hair become straighter, smoother, and less frizzy over time, so your straightening routine becomes faster and easier, and hair spends less time exposed to damaging heat styling - for healthier-looking, just-from-the-salon sleek hair. This straightening technology works with your heat appliances to train hair to remember your straight, sleek style each time you straighten it. Scientifically-proven heat protection guards against heat damage. Fortified with NexxuSphere: Exclusive NexxuSphere time released technology contains nutrients, antioxidants, and UV protectors. Never tested on animals. Made in USA.