Masks are always a good idea when you want to relax and treat yourself with something nice. Sheet masks of course were created to make life easier and less messier. I mean when you apply the mask with a brush and then you struggle to wash it all of? Not that pleasant.
Sheet masks of course are a bit controversial. How can that sheet contain the benefits that your skin really needs?
No one knows, but there are fun to try and you can decide if it is working for your skin or not.
Meanwhile you can always try to make your homemade mask from oats and honey.