Featuring a shoe upper on a sandal bottom, they combine the year-round style and protection of a shoe with the natural comfort of a sandal. We like to call this Barefoot UnTechnology. This sandal-shoe hybrid allows your foot to bend and flex the way nature designed you to walk. The loose upper allows your foot to spread so it can absorb shock naturally. This strengthens the small muscles which support your arch and encourages you to walk correctly. Sorry if there are no springs, coils, pumps or air-bags, but after walking naturally you won't want to wear anything else...but then again, what do we know? We're just a bunch of surfers in sandals.