Sebastian Dark Oil Lightweight Shampoo 50ml Lightweight Shampoo infused with a special blend of oils. The Dark Oil Lightweight Shampoo cleanses while adding natural body and shine without weighing down the hair. Suitable for all hair types, leaving your hair up to 3 times smoother. Use: Massage the product on wet hair to activate the foam. Rinse thoroughly. Repeat if necessary and continue with the Dark Oil Conditioner or Dark Oil Mask.