this is a huge example of "get into a bootfitter". if he wears size 15 shoes it doesn't necessarily mean he's a size 15 boot. he needs to be properly sized for a boot.
i guess he could look for a size 32 which i know salomon at least used to make and i think lange was making the blaster line of boots in that range as well.
he definitely will not be getting a "freestyle" boot so that's completely out the window
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