This hair dryer is equipped with high-penetration "nanoe" technology. By changing the generation method, the amount of moisture generated is 18 times that of conventional models. High-penetration "nanoe" penetrates from the tiny gaps in the cuticles, moisturizing not only the surface of the hair but also the inside, hydrating the hair from within. The smoothness makes a difference with continued use. It suppresses hair roughness caused by friction damage, leading to smooth hair. I have been using it since January 2020. It's still usable. Will ship after January 5th.