This is a ultra light glow oil with Squalene, squalene--what is it exactly? An ancient deep sea monster that fights pirates? A triangle with unequal sides? A lightweight moisturizer that can do everything? Yes, that's the one. It really is one of the most amazing, where-have-you-been-all-my life single source serums out there. Easily absorbed and light enough for layering and day time wear, you're going to love this simple plant-derived solution.