I started using Tresemme Thick and Full formula shampoo and conditioner a couple months ago, and I love it. My thin hair has a lot more body and fullness. I have fine hair that is thinning because of medications, and this stuff makes it feel so much fuller, like it used to feel.
I usually let my hair air dry, but when I blow dry it, this stuff really makes it full.
My hair is wavy, but I use a flat iron on it. My other go-to product is Living Proof Prime Style Extender, bought at Ulta. A little bit of this in my hair after I get out of the shower, and I can go several days between washings. The Tresemme fullness lasts, combined with this.