Review (4/5): Reduced puffiness
I was surprised when the instructions said to leave these on for 1 to 2 hours as I am used to other under eye patches only being on for 20 mins. I had the patches on for 1 hour and 25 mins. It had a slightly cool feeling the whole time it was on. I have sensitive skin and had no adverse reaction to it. I was impressed that my eye puffiness was visibly reduced.