While we would all love to be able to go to bed and fall asleep immediately, the reality is that there are a number of reasons why that isn’t possible. Insomnia is a real issue for a lot of people, and it’s not always stress that keeps us awake when all we want to do is sleep. This is where a sleep eye mask can come into play, as it can make you feel as though you are in the darkest possible space, making it easier to slip into deep REM sleep.