Esquire:

Allbirds shoes are comfortable, sustainable, and versatile. Shake Shack is happiness-inducing and delicious. It's harder to dream up a better summer collaboration than this one: Allbirds is launching a (very limited) Shake Shack shoe. And that "limited" is no joke—the shoe is only available on Thursday, May 24, in New York City's Madison Square Park, from 10 a.m. to 8 p.m.

The new collaborative runners will be on sale at the original Shack in the park, where you can buy food, the sneakers, or both. The sneakers themselves are exactly what you would want out of a collaboration like this. They’re the Tree Runner, the brand’s classic shape, in its new fabric sourced from eucalyptus trees. But the colors are what truly make the shoe special. The sole and upper are a not-too-bright white, while the laces and tongue are bright, Shake Shack green. Plus, there’s a tiny Shack burger on the tongue. If you know, you know.