展开Why Use Serum: Curlsmith Intense Treatment Serum is a unique hair oil in a solid format. It restores strength, shine and softness to damaged, weak or brittle curls. Hugely versatile, it is great both as a leave-in serum and as a wash-off treatment, depending on the hair type. Its solid, waterless nature makes it incredibly portable for traveling (no issue with your liquid bag at the airport!) and convenient (no leaking!).