A dark sleeping environment is absolutely vital for a good night’s sleep. Often time, it’s very difficult to get your room pitch dark, even with heavy curtains. This is why I recommend the nightly use of an eye mask.
I’ve been using an eye mask for years now and have found that it greatly improves my sleep. I have also had clients that swear by them and would never go back.
I use a very simple organic cotton eye mask. It has a great feel and is easy to use.
I have no affiliation with this company, but it is just the one I use myself and the one I recommend to clients because of its price point.