Our Vitamin C Under-Eye Patches contain hyaluronic acid, vitamin C, collagen. It enhances skin firmness and improves fine lines and sagging. The way it works is simple:1. Clean the eye area and pat dry. 2. Remove the eye patch and fit along the contour of the eye. 3. Gently press the edge of the patch with your fingers, making sure the patch is close to the skin and there are no air bubbles. Hyaluronic acid binds to collagen to provide deep nourishment and hydration to the eye area. Vitamin C effectively improves dullness, reduces dark circles, and makes the eye area radiant.