Somewhere on BYC someone posted a Finnish study of white petrolatum as a protectorant. They found that it may protect the skin by about 1 degree. But it caused people to get a false sense of security resulting in increased incidences of frost bite.
What the Vaseline does do is protect the skin from moisture loss, drying out and cracking. But not the cold.
What the Vaseline does do is protect the skin from moisture loss, drying out and cracking. But not the cold.