I use the John Frieda "Straight Ahead" shampoo. I LOVE it. Its a little pricey, but definately worth it. I have naturally curly, frizzy red hair, and this is the only shampoo that really allows me to wear it straight, and it eliminates ALL of the frizz. I do use a claififying shampoo about once a week, b/c it has a tendency to build up, but other than that I love it! I'll never switch!