We call them “thongs” in Australia. The Archies footwear come with an arch support built into them. We sell Archies in our clinic in Melbourne and they sell well. Pretty much everyone who tries on a pair buys them They are that comfortable. What is useful about the Archies is that they can be used by those who need or have foot orthotics but want to occasionally wear this style of footwear.
The other great thing about these is that can be modifiable. I sometime get on the tools and make what I call a MOSI Archie modification for those with a more medially located subtalar joint axis. I made this video on the technique.
I also occasionally answer a question online about them!