Bought these as I work 12hr shifts, mostly spent pounding the hospital. My poor old feet needed something robust, comfortable, machine-washable (!), and breathable. They meet all the above criteria. However, I ordered size 6 - normal for me - but it was a tad small length-ways. The size on the shoe reads size 5-6, but they don't specify that on the order page. Despite this they are very comfortable, even if they look a bit goofy. What's great about crocs is that they are nice and wide, so plenty of room for hot feet to swell a little. The air vents are brilliant, my feet weren't too hot or stinky at all!