My favorite serum of all time!! I don't know what took me so long to order this one, but Jen recommended it for hydration, and after finishing up some other (also lovely) GoW serums I finally got myself one of these. It is the most supremely hydrating serum I have ever used. It feels dewy but not greasy, and gives that sinking, unctuous hydration that feels like it really penetrates. I am prone to dehydration, and sometimes it feels like nothing actually soothes it, and products are just sitting on top. Not with Es-care-go!!! I don't even need a cream during the day anymore, which for me is unheard of. Before, without a copious layer or some sort of cream or oil my skin would feel tight. I credit this serum with allowing me to use some retinol again, which is another huge win. Can't live without this one!!!! Thank you GoW!