Sebastian dark Oil is an evanescent styling oil that replenishes your hair from the inside out to smooth the cuticle and add body to your hair. It then magically disappears from your hair thanks to the new DiffusX Technology. Formulated with sandal wood, cedar wood, and argan oil which protects against harmful UV damage. To use simply apply to your dry or damp hair, through mid-lengths and ends and style. Re-apply to dry hair as needed.