A lecture on bags from a guy that doesn't even know what a VBL is for is pretty funny.
Certainly is. REALLY funny when "that guy" has spent weeks at a time in sub-zero conditions wearing VAPOR BARRIER boots. Get a clue [bleep].
LOL, "VBL Boots"... Did you mean "VBL socks" or "Rubber Boots" (aka Military Mickey Mouse Boots), or maybe a combination of the two?
I always thought VBL socks were a bad idea, but that's me and my feet.
VBL in a down bag at sub zero temps is another thing... good grief.
Hint: the conversation is about sleeping bags. More specifically whether a down bag can be kept dry in a variety of conditions.
