These eye patches feel nice but they are super slippery because of the amount of essence in the jar. I bought these on clearance at Ulta. I used them once a week to brighten my undereye area and reduce puffiness. The essence contains hyaluronic acid and niacinamide. Black charcoal is intended to help purify the skin. They are nice and cooling but they have a weird shape, making it difficult to remain in place on the eyes. I would not repurchase.