. Benefits: Build sky-high volume and everyday fullness with favorites from Bumble and bumble's Thickening Collection.. Volume. Hydrates. Softens. Lightweight. Features: Formulated for:. Patterns: wavy (2A-2C) to straight (1A). Diameters: fine to medium. Condition: untreated, color-treated, dry. Ideal for: fine to medium hair types seeking lightweight volume and fuller-bodied styles. Research Results: When Thickening Volume Shampoo is used with Thickening Volume Conditioner, this washday duo gives:. Instantly thicker hair. 2x less breakage*. 2x shine**. *vs. untreated hair **vs. unwashed hair. Thickening Dryspun Texture Spray delivers +40% more volume instantly vs. untreated hair (and it lasts all day)..