This is the relatively new Kiehls Iris Activating Treatment Essence (£36). Inspired by Asian skin care, its a moisturising liquid that you apply after cleansing and before your moisturiser.
As you can see its just like a slightly viscous liquid.
I generally pat this into my skin and I have to say it sinks in immediately and leaves my skin soft and hydrated. This essence not only hydrates but also gently exfoliates (using AHAs) and is also anti-ageing.
I am really loving using this as part of my skincare routine and so far my skin seems to be liking it too!