Hair Thickening Serum - BenefitsParaben-free, SLS-free, SLES-freeEasy to apply to either wet or dry hair and suitable for all hair typesVolumizes with hair building blocks biotin and keratin and fortified with marine collagen and seaweed extractA lightweight, volume-boosting leave-in treatment for thicker looking hairIt is a lightweight leave in treatment that coats each hair strand creating multi-dimensional density without frizz leading to thicker fuller hair - Hair Thickening Serum