Collistar styling products. PERFECT HAIR volumizing shampoo. Densifying shampoo to add volume. Its formula guarantees a progressive restructuring of the hair fiber, providing strength, shine and volume to the hair. The ingredients that make this possible are state-of-the-art silicones that act on the hair fiber increasing the density of the hair without weighing it down. Thanks to this, your hair will look stronger, denser and more radiant.