Vaporfly is indeed the shoe from the Breaking 2 project Nike had earlier this year at the Monza track. But the heel from that shoe looks different than the heel from this one. And Kipchoge is for sure not a heel lander.

Still a strange heel to see. Gonna try them in a shop. Just want to feel what the heel does.

Barefoot is a choice I 'just do it' because I prefer running at the beach. ;)