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
Yeah he is prob a 31 or maybe 32. Salomon, head and atomic all make boots this big. Most shops can't sell boots that big so you should be able to find deals. But go get him measured up so you know what you are looking for size wise. You can't go off shoe size.
Pretty sure a size 32 would get him by. He is a beggining skier so I think the Nordica One 65s would be a good fit. Rental style rugged! What monster feet....
Don't just buy him a boot. Go take him a Nd have him measured. Big feet are harder to fit as people think they are wide but often the width does not correspond to the length so what looks line a wide foot may actually be narrow for the size. Like I said most shops will have big boots sat around as they are so hard to sell so your best deals may be in shops.