For increased density and volume, go with the best shampoo and conditioner offered in the Amika 3D Volume Plus Thickening Shampoo 33.8 oz and; Conditioner 33.8 oz Combo Pack. You can be sure of hair that is not only volumized, but thoroughly cleansed and conditioned without being depleted of natural moisture. Say goodbye to dull, flat hair. Shampoos and conditioners are the building blocks of a good haircare regimen. The Amika 3D Volume Plus series is your go-to for richer and fuller hair.