Elon Musk: Nike Lunar Flyknit HTM NRG

It's hard to be 100% sure, but we and Flight Club estimate that Musk is wearing Nike Lunar Flyknit HTM NRG, a shoe created by renowned design trio Hiroshi Fujiwara, Tinker Hatfield, and Mark Parker.

These shoes are hard to find, not to mention expensive. They're sold out on Flight Club's site, but you can find a pair on eBay.