Vaseline Petroleum Jelly Is A Mixture Of Mineral Oils, Paraffin And Microcrystalline Waxes That, When Blended Together; Create Something Remarkable - A Smooth Jelly That Has A Melting Point Just Above Body Temperature. The Result - It Literally Melts Into Skin, Flowing Into The Spaces Between Cells And The Gaps In Our Lipid Barrier. Once There, It Re-solidifies, Locking Itself In Place. Vaseline Petroleum Jelly Serves Two Functions: First It Helps Keep The Outside World Out - It Protects Skin From The Effects Of Weather And Exposure. Second, It Acts Like A Sealant To Help Keep The Inside World In - It Forms An Occlusive Barrier To The Natural Water Loss Of Our Skin. So Skin That Is Dry And Chapped Is Protected From Drying Elements, Enabling Skin-softening Moisture To Build Up Naturally From Within The Skin