I have several pair of Keens.  These, as usual, are great for wide feet like mine.  They are extremely comfortable all day long, once I get them on that is.  I also have a high arch, and the opening in the shoe is a little smaller than I would like to get them on.  There is a little wedge of elastic in the front opening that stretches to allow you to put them on, but no other adjustment to loosen to facilitate putting them on.  Once they are on, they are perfect.