Well, if they're in the snowy mountains they have thick hides and fur... and sharp teeth to burrow if their claws aren't good enough. We had some pictures in the family tomes.

[ He also may be going off of a few things he'd seen on Dragonspine when he had visited. They hadn't been spirits, but they had made sense with the terrain. Snow monsters can be ladies too! Even if he actually has no idea if any of the ones he had seen were female. ]

Yours is nicer.