This is 100% hyaluronic acid with no additives mentioned on the ingredients list which at first seems to be great.
In my opinion it does not do that much in terms of moisturizing but it feels quite good nevertheless.
A small minus is the initial smell which feels for me a bit rubbery but to be fair - it disappears quite quickly.
In terms of moisturizing/effect/smell I feel my cosrx snail essence is a much better choice.
However, this is still a nice essence/serum for example to dilute or enrich your cream or foundation.