Too Cool for School All-in-One Egg Mellow Cream 5-in-1 Brightening Korea Cosmetic Firming Moisturizer 50g New product. Comes in original retail packaging. Box may show wear. Too Cool For School Egg Mellow Cream is a firming moisturizer, working as a serum, priming moisturizer, eye cream, neck cream, and sleeping mask in one. It's highly enriched with egg yolk extract, albumen (egg white) extract, and inka omega oil to provide intensive nourishment to skin. It is also infused with collagen fiber to support the appearance of more elastic skin.It's highly enriched with egg yolk extract, egg white extract and inka omega oil to provide intensive nourishment to skin.It's also infused with collagen fiber to support the appearance of more elastic skin. 5-in-1 Firming Moisturizer.Brightening & Anti-Wrinkle Properties.All-In-One Collagen Infused Firming Moisturizer.