XL flow snowboard bindings and size 15 boots

Size 15 boots and XL flow bindings- selling bindings with boots because it was hard finding bindings to fit these boots in such a large size. My husband is 6’9” and used these as a beginner, boots are in good condition except for slight wear/fraying on left top from where he was sitting his board wrong in lifts, but structurally, they are sound. Bindings are pretty much at max capacity with these boots, but they do fit. He bought both new and used for 2 trips with probably 30 total hours on both.