I was so skeptical about spending close to $100 on a mask. I read every review and watched every YouTube review I could find until I decided to just give it a try-- and I'm soooo glad I did! I've had an 11 line forming between my eyebrows when I sleep for a few years now. It goes away more throughout the day, but I notice it very prominently when I wake up. I don't furrow my brow much throughout the day, so this led me to believe I was doing it in my sleep. The mask just relaxes my facial muscles. I don't know if I was scrunching my eyes whenever the light came in in the morning or what, but when I woke up with the mask on there was no line at all and I had some of the best sleep in my life!!! I will never be without this mask! I don't know if it will work on someone that has 11's from aging or furrowing their brow throughout the day, but if you do it in your sleepy give this mask a try!!