SEB MAN The Booster Thickening Leave-In Tonic

Sebastian Professional SEB MAN The Booster is a lightweight thickening leave-in tonic that lifts and adds texture without stiffness. It feels water-light and absorbs quickly, suited for fine to thinning hair seeking everyday volume. Ideal for those who prefer non-greasy, style-ready formulas; often fragrance-free and compatible with color-treated hair.