Does Sun in Fade out?

Question: How long does sun in stay in your hair? Answer: It is permanent, and will grow out as your hair grows out.

Does Sun-In wash out?

Answer: The effects of Sun-In are not able to be washed out. It contains peroxide and is lightening the natural color of your hair.

How long does Sun-In last?

Astronomers estimate that the sun has about 7 billion to 8 billion years left before it sputters out and dies. Humanity may be long gone by then, or perhaps we'll have already colonized another planet.