Sebastian Professional SEB MAN The Boss Thickening ShampooDescription How to Use Ingredients SEB MAN The Boss Thickening Shampoo thickens and refreshes all hair types. Its great for those with fine hair, making the hair visibly more voluminous and fuller. This shampoo features guarana extract and a stimulating scent of bergamot and pink pepper for a vibrant freshness. For best results and visibly thicker, fuller hair use with The Booster. Apply a small amount over wet scalp and hair. Work into a lather.