Revitalize your hair with Kérastase Genesis Homme Strength and Thickness Boosting Spray, designed for weakened and thinning hair. This spray enhances hair fiber thickness, providing a fuller look and lasting volume for up to 24 hours. It's easy to use: just spray onto damp hair from roots to tips without rinsing. Kérastase is dedicated to sustainable beauty, with innovative packaging and carbon-neutral production. Experience thicker, healthier hair with Kérastase.