Let's start with the definition of lotion, Here we go… A lotion is a low-viscosity topical preparation intended for application to unbroken skin. By contrast, creams and gels have higher viscosity. Lotions are applied to external skin with bare hands, a brush, a clean cloth, cotton wool, or gauze. read more
But that doesn't mean the product itself is dirty. It goes through a refining process, and Vaseline—the brand—is triple purified. Can't vouch for off-brand purity though. As far as moisturizing goes, think of Vaseline as creating a thick barrier between your skin and the environment—the opposite of a humectant, which draws in moisture. read more