These sandals are incredibly comfortable right out of the box. I put them on expecting to need a little "breaking in" time and after 1/2 hour forgot I had them on. I wore them for 16 hrs. straight with no rubbing and no marks whatsoever! They do run a little bit long, usually wear a 9 shoe so I ordered a 8.5 and they're still - not much - a little too long, not noticibly though. I  bought the first pair in white and ordered the second in red in a size 8 - perfect fit. Would have liked to get the black ones as well but really just didn't like the light color footbed and tan sole with the black upper. They look cute with jeans and are the next best thing to going barefoot. Wish they had more colors.