Huge news for sneakerheads and film buffs alike: Nike is re-releasing the infamous Air Mag sneakers from Back to the Future II with the fully functioning auto-lacing. After Michael J. Fox teased the pair during an appearance on Jimmy Kimmel Live! Last year, Nike surprised the internet by tweeting at Fox with “Excited for tomorrow.”

Today we found out that 89 pairs of the Air Mags have been produced. As with past releases, people will have a chance at auction for a very limited number of pairs. As a general release, Nike has opened an online raffle to the public.

An infinite amount of tickets can be purchased at $10 a pop for a chance to cop a piece of sneaker history. All benefits from the tickets will go toward the Michael J. Fox Foundation. The raffle will run from October 4 through October 11. Winners will be announced on October 17. Take a look at what Nike CEO Mark Parker had to say about the 2016 Nike Air Mag release here.

Best of luck if you’re looking to grab a pair, you’ll surely need it.