Dermalogica Hydration on the Go Kit. skin concerns. All skin types. Dryness and dehydration. This time of year, changes in weather, lifestyle, and diet can affect our skin – we need to stay hydrated on-the-go. Get glowing, smoother, healthier-looking skin with our calming oat-based powder exfoliant paired with ultra-replenishing Circular Hydration Serum.. Hydration on-the-go. Includes:. Skin Smoothing Cream 15ml​, Circular Hydration Serum 10ml, Daily Milkfoliant 13g.