Visibly boost your hair's texture and volume with the Redken Acidic Grow Full System Densifying Shampoo & Redken Acidic Grow Full System Densifying Conditioner Duo. Set Contents: Redken Acidic Grow Full System Densifying Shampoo for Thin Hair, Strengthens & Thickens 300ml Supercharged with azelaic acid and a densifying complex, the pH-balanced formula is designed especially to cleanse thin hair. Gentle on the lengths and nourishing, it works to deliver a volumising yet weightless effect from root-to-tip. Redken Acidic Grow Full System Densifying Conditioner for Thin Hair, Strengthens & Thickens​ 300ml Powered by the same densifying complex and azelaic acid, this pH‑balanced conditioner envelops each strand in lightweight moisture. It helps nourish fragile-feeling lengths, supports fullness and works to minimise visible breakage for hair that feels stronger and healthier.