So when I was last in Costa Rica I saw this guy wearing shoes similar to these.
I thought they were pretty cool so I asked him about them. They are called Vibram Five Fingers. I got these because they had the strap across them so they won’t fall off in the water.
Direct link to Higher Quality video.
They’re a little thin on the soles and I never go barefoot so I’ll have to see how these work for me.
Here’s a similar pair at Amazon.