After reviewing my notes almost the whole night for the exam, I decided to try this product. These patches are gentle and cooling. When I put them on, I immediately started feeling how my skin under eyes tried to absorb all essence from the patches. As soon as I took them off, I looked at the mirror and unfortunately didn't see any difference. My dark circles were still there and didn't even disappear a little bit. I can't say that I didn't like the product because it still made my skin under the eyes colder and smoother. However, I will not repurchase them again for sure!