with Klairs Freshly Juiced Vitamin E Mask. I use this mask as my nightime moisturizer. I have been layering it over a Retinol serum and they seem to combine beautifully. It is desinged to also enhance the effects of Vitamin C so go ahead and layer with a C serum as well. The power ingredients are Niacinamide and Adenosine. The feel is that of a gel cream. I love this brand, and this has been my fave find from them.