These are very easy to apply. You simply place them right under your eyes. I apply mine at night right before bed, since they do have to be left on for eight hours. They do kind of feel like gel, and stick perfectly to your skin without leaving a sticky residue. Right after you apply them, you will feel a slight cooling, which is perfectly normal. In the morning after taking these off, I could tell my eyes were less puffy, and after using the whole pack, I did notice that the fine lines did seem to become less noticeable, and had shrunk.