These are way too tight across the instep!  Definitely cannot wear with socks in winter and actually still too tight across the instep even without socks.  Love the cushion and arch support of the soles but that doesn't do much good if the shoe is too tight.  Going to larger size will just cause the arch support to hit at the wrong spot as shoe will be too long.  Its a shame because the other features are just what I was looking for.