SEBMAN THE BOOSTER thickening leave-in tonic 100 ml SEBMAN THE BOOSTER thickening leave-in tonic 100 ml is a leave-in tonic designed to help thicken and strengthen the hair. It is enriched with natural active ingredients such as Biotin, Panthenol and Vitamin B3, which help to nourish, condition and protect the hair. It is also formulated with natural plant extracts to help reduce hair loss, stimulate hair growth and reduce split ends. The leave-in tonic is easy to use and can be applied to damp or dry hair. It gives hair a natural and healthy look and feel.