Just commenting on this 5days old post to point out that if you're cold putting one weight is efficient but still far less than putting on some clothes. Only their nipples are vaguely protected from frostbite.
Seeing the repartition on the body, my first instinct is to think it's not, but it may indeed be walrus fat in human places, as weird as it sounds. But even so, I'm not sure it's sufficient, especially considering how their skins are different.
(Who's up for a little dissection?)
(Who's up for a little dissection?)