NEXXUS Therappe shampoo and Humectress conditioner are a great duo. You don't need to use them together, but both products are very moisturizing and not greasy.
At one time, they were only sold through hair salons, but now are available at many places. I used them in my hair salon before they went " public."
You can even apply a small amount of Humectress to your dry hair between shampooing in addition to applying it to wet hair and rinsing it out.