This eye serum has a metal rollerball that makes the application very easy and very refreshing on the eye area. At first I was a bit concerned about putting pressure on the sensitive thin eye area but the product is released easily and can be applied without any pressure to the eye area. It immediately cools down the eye and it dries fairly quickly. It can be used over or under makeup. It contains potent antioxidants, caffeine, and botanicals to soothe and brighten the eye area almost immediately.