We call them “thongs.” The Archies come with an arch support built into them. Our clinic in Melbourne offers Archies for sale and they're in high demand. Pretty much everyone who tests a pair ends up purchasing them. https://www.blogarama.com/health-and-fitness-blogs/1354320-clinical-biomechanics-boot-camp-blog/39584341-big-fan-archies-flip-flops