KEENMen's Austin Low Height Leather Oxford

Are these very breathable? My husband is worried about his feet getting too hot.

Where can I get replacement laces and insoles for these shoes?

Are these shoes good for those with high arches?

I wear a size 12 4e, and i was wondering how wide are these shoes in say a 11 1/2 d? could anyone let me know if they can about this width? jb-nv