Vaseline, made from petroleum jelly, acts as an occlusive agent: Locks in Moisture: Creates a barrier to prevent moisture loss. Protects Skin: Shields minor cuts and dry patches. However, Vaseline doesn't hydrate the skin on its own; it seals in existing moisture. For aging skin that requires both hydration and moisture retention, a product like Aveeno Daily Moisturizing Lotion is more beneficial. It not only locks in moisture but also delivers hydration with ingredients like colloidal oatmeal.