I have problem feet, between diabetes, bad knees and plantar faciatis, I have a horrible time finding shoes, much less sandals. Fell down my stairs over 10 years ago and heavily bruised my foot, nothing broken, and haven't even been able to wear flip flop since without major discomfort. I bought my first pair of Keens on a whim on my way to an amusement park day (ALL DAY), and they were so comfortable. That was 3 or 4 years ago, I'm up to 4 pairs of the newports and a pair of boots. Just waiting for pair of sneaker type shoes that I like and I'll be set.