This ultra-light volumizing shampoo for fine hair is clinically proven to strengthen, repair, and prevent future damage from everyday elements, styling, or salon services. * The best shampoo for fine hair has to repair as it volumizes. No. 4FINE gently removes buildup to leave hair clean and soft with lasting volume, body, and bounce - never weighed down or dried out. *When used with No. 5FINE Bond Maintenance® Conditioner. | Olaplex No. 4 Fine Bond Maintenance Shampoo, 250 ml | Dermstore