I knew when Serena launched this product, I wanted to have it. I was looking for natural product to layer under my moisturizer during the colder months. This serum is perfect as its lightweight and does not leave a oily tone. I also started to use this during the summer before bed as a moisturizer when I wanted something lightweight after a long day. I always bring the hydra serum when I travel as my skin can get very dry after a flight. I heavily apply this product before the flight and as soon as I touch down. It works as a hydrating barrier that keeps my skin calm and plump in varying climates.