Gently cleanse & remove impurities from your hair with Redken Cerafill Defy Shampoo Duo. Featuring Cerafill System Technology, the treatment strengthens fibre to prevent breakage & energises hair follicles to re-densify hair. Working to improve the appearance of thinning hair, the shampoo nourishes to promote a healthy looking scalp environment. Directions for use: Apply to wet hair Massage into a lather Rinse