The skin of your feet benefits from wearing sandals. The typical shoe stays too moistly from sweat. Sweat is a bit salt that draws even more moist from your feet.
The salt in your sweat also degrades the toe-nails. Your toe nails dry out and can crumble!.
toe nail polish also has a harder time staying on in a salty environment
Woman usually have less problems with smelly feet or calcified toe-nails. This due to the fact that ladies wear open shoes quite often.
Even if you are not a sandals fan, you really benefit from these shoes.
Sandals are healthy footwear!