Very comfortable, usually buy 12 sized flips, these run just a little tight, but not bad at all....if you have really wide or fat feet, maybe go one size up. Got mine in brown as they were $22 at the time....wanted gray or black but those were $40....at $22 they are a good buy.  I buy Chaco flips alot....those have a more solid sole, last a long time...but not as comfortable - these Sanuks feel better but the materials won't last as long....Chacos go for $50+ range these days, Sanuks at $22 are well worth it....not so sure I would spend $40 on them that the other colors are priced at this time.