I bought these more with the idea of walking in them once the weather warms up in order to strengthen my feet and calves.  So far I have only walked around my house in them. I agree with the reviewers who recommended buying your street shoe size rather than your running shoe size. I wear a 7.5 (38) in street shoes and a full size larger in most running shoes and the 38 in these fit me fairly well.  They do feel a bit snug and narrow but they are stretchy enough that I don't think this will pose a problem for me, but I don't have wide feet. I can't imagine wearing any kind of sock with them, however. I can't believe I am writing this but I actually think they look cute on my feet!