A good skincare routine unquestionably includes hydrating serums. These products contain active ingredients such as vitamins and antioxidants that deeply penetrate the skin, all the while boosting the positive effects of your other skincare staples. During the colder months, when the skin tends to become dry and dull, a serum is an absolute essential as it multiplies the efficiency of your hydrating cream. Here is a list of our favourite hydrating serums, ready to take their rightful place on your bathroom shelf.