I dunno exactly, she read about them somewhere. They just arrived today, and her first response was, "These make me feel seasick" :roll: Then she said that they were cool, after skipping around a bit on them.
Reading about them is pretty interesting, based on the Masai people walking barefoot on uneven ground in Africa, they say. Yeah, supposed to be very good for musculature, balance, and posture. I gave the website for them with my first post, they give a big explanation. She got the sandal type, not the tennis shoes. Kind of small for me, but I tried them, and it felt like walking on a pile of squishy bananas....strange.