These are by far the best under eye patches I have used. I have always had dark circles and these have helped. They haven’t eliminated them completely, I think genetics plays a role in that, but they are better. I keep these on for the max 30 minutes. The biggest improvement I see is in the puffiness. I love salt and drink a lot of carbonated beverages which tend to make my under eyes puffy. These have helped me a lot. They are so easy to use and I have had no sensitivity issues at all.