Bought for walking holiday in hot country. They are very lightweight and have thin soles - which does mean very rocky ground less comfy but it was not a problem, one would use walking shoes rather than sandals in those circumstances. Also work extremely well for airplane - so light it feels as if not wearing shoes. The elastic around the top of foot is quite restricted so when foot has swollen at end of day slightly harder to get on. That's the main reason they don't get five stars.
These are well constructed and though I am heavy on shoes they are lasting well. Velcro straps easily adjusted. Firm sole and thick so good for walking on stony ground. Have been used on beach and wet with sea water without problems. Size - I chose my usual size and they fit comfortably. Straps are long enough to cope with foot swelling or fat feet!