BUMBLE THICKENING CONDITIONER 33.0OZ. Benefits: Volume. Ideal for Fine to Medium hair types seeking a lightweight volumizing shampoo. Diameters: Fine to Medium. Condition: Untreated, Color-Treated, Dry. Color Safe. Hydrates. Free of parabens, formaldehydes, phthalates, and mineral oil. Key Ingredients: Strand-Plumping Technology instantly thickens and plumps each strand.. Formulated with Panthenol (Pro-Vitamin B5), this conditioner adds moisture and promotes healthy-looking hair.. Research Results: When our Thickening Volume Shampoo is used with our Thickening Volume Conditioner, this washday duo gives:. Instantly thicker hair. 2x less breakage*. 2x shine**. *vs. untreated hair. **vs. unwashed hair.