Their called Vibram 5-fingers and, I’d suggest you check sporting goods stores in your area before purchasing… or, check the site as stated above and find a location near you. Currently, here in SoCal, pretty much every sporting goods store carries them.
Try them on, walk in them. Don’t purchase from the site. They’ve come up with some delicious new styles yet, they’re not made for all feet.
If you’re not walking barefoot a lot, or running barefoot, go slowly then slow down and break in your feet. They’ve most likely lost a lot of padding and support from shoes and if you go too quickly you could injure your feet.