I'm a size 10 womens shoe, and whereas the modi unisex flip flop was too small, this footbed is just about perfect. the sling that goes over the high part of the foot, however, has irriated my skin repeatedly with it sticky rubber rubbing. I was looking for a shoe that would allow my feet to be free of tension, but this isn't it. I find myself using my toes to grip the shoe in place all the time, and adjusting that sling often as well. If you just walk as if you were barefoot, the shoe may very well go flying off ahead of you.
Add to what I consider to be a flawed design, the fact that when barefoot, the soles of your feet will become very sweaty in these. Not cool.
The ergonometry of the arch is nice, as is the texture of the footbed, but they're too much work to keep on comfortably.
I did fine ONE WAY to wear these and feel great in them. With thin dress socks! I got black, so with my nice black knee high socks and jeans these shoes are just about passible in the fashion world (of moms and crunchy chicks) and honestly perfect for a Florida winter! Which is the ONLY reason I just went ahead and kept these. Not really happy with them, though. I might be done with Crocs for myself. Hubby is a believer in them, though.