Ectoin Hydro Barrier Serum.

"This particular product has a very lightweight gel-like texture. It layers under moisturizers really well or under sunscreen if it's something that you use in the morning. In my experience, it felt nice going on, absorbed pretty quickly, and it didn't interfere with any other products that I put on on top. Once it dried down, it didn't really leave my skin feeling immediately quenched, moisturized. I felt like I needed moisturizer on over it. It wasn't drying, but it wasn't quite like I had just moisturized my skin. The pros of this are that it's affordable and it's easy to layer. A con is that it just kind of dries down a bit filmy and doesn't really leave the skin feeling immediately moisturized. It's more something that you would layer underneath a moisturizer or underneath your moisturizing sunscreen during the day. If you have really oily skin or you describe your skin as combination, meaning you have a lot of oiliness but patches of dryness, this might be a formulation that meets your needs."

"This is the ectoin hydro barrier serum from The Inkey List. I ended up enjoying this, but it is not as hydrating. It's not as moisturizing. It doesn't impart that overall improved plumpness, smoothness, radiance, and glow. So you are paying less, but you're not quite getting the same thing. This is fine, but I don't know that I would necessarily repurchase it."