Formulated with the hair-building blocks Biotin and Keratin, and is fortified with marine collagen and seaweed extract. It is a lightweight leave-in-treatment that coats each hair strand, creating multi-dimensional density without frizz leading to thicker fuller hair. It’s easy to apply to wet or dry hair and will not make hair look greasy. The Thickening Serum contains signature floral fresh fragrance, infused with lush greens, dewy florals, and hints of ocean breeze. 1.69 fl. oz.