The step that locks everything else in You can do all the hydrating ampoules in the world, but without something to seal it in, a lot of that benefit evaporates — literally. That's the job of the Aquaporin Cream. It's the finishing moisturizer in TROIAREUKE's Skinbooster Program, built to lock in whatever hydration the Aquaporin Skin Booster ampoules just delivered, while also supporting a stronger moisture barrier over time.