Curl definition and frizz control in a quick, easy at-home product. This lightweight, proven leave-in conditioner locks moisture into curls, waves & weaves. This is the curl-defining formula designed for us, and when we say “us,” we mean many…even if you are not mixed, you may have frizz and unruly curls, right? Tames frizz. Defines curls. Works on many hair textures & extensions (synthetic or human). Can I use this on frizzy straight hair? Mixed chicks® leave-in was designed for curly hair, but we have straight-hair customers who use this product regularly and say good things about us behind our backs.