Whether your skin is on the oilier side or vice versa, moisturizing is the foremost care in all seasons. A good moisturizer helps your skin stays at its optimum level of hydration, which eventually leads to improvement to a variety of skin conditions, even a stubborn skin problem such as acne.  Applying a moisturizer followed by a serum enhances the benefits from both products. It not only provides much needed hydration and protection but it also creates a healthy protection barrier to hold all the goodness in for better absorption.