“Conventional wisdom is clear on why, since time immemorial, wolverine fur has been the preferred material for hood trim in the High North. In essence, the thick, dark, oily fur is hydrophobic, which means it repels water, and thus prevents the build-up of frost caused by condensation of the wearer’s breath. The only problem is, none of this is true.
While everyone agrees that wolverine fur makes the finest lining for parka hoods in sub-zero conditions, experts still don’t have a clear understanding why. But they do know that it’s not hydrophobic, it doesn’t repel water, and, given the chance, it allows frost to build up just like any other fur.”