Five years ago, Nike patented the Marty McFlys—you know, the self-lacing shoes from Back to the Future. But that was just a patent (which you can find in full here). Companies patent lots of things, crazy things, insane things that never have the slightest chance of becoming reality. But this is not one of those things. Nike confirmed that the self-lacing shoes are a real thing and Michael J. Fox himself has already gotten his hands (er, feet?) on a pair today.

So then, the real question: When will you get yours? That remains to be seen (spring?), but until then, we went deep into Nike’s patent for an Automatic Lacing System to explain a little better how this magic is actually working. Very, very basically speaking, Nike patented a motorized system that will guide laces into their correct positions. An ankle cinching system will use a coil spring to tighten, keeping you snug, totally hands-free. But don’t just take our word for it: Check out the patent images and descriptions for yourself.

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Here’s How Nike’s (Real) Self-Lacing Marty McFly Shoes Work