Nike announced plans to release 89 pairs of the “Nike Mag” shoe through an online draw. The shoes light up and feature adaptive lacing—which lets a wearer push a button to tighten or loosen a shoe—making it a true replica to the footwear from the 1989 film Back to the Future Part II.

Contestants can pay $10 to enter the drawing, which will count as a donation to the Michael J. Fox Foundation. There’s no limit to the amount of tickets one can buy, so buying more gives the aspiring sneakerhead a greater chance of winning.

All of proceeds from the 2016 drawing—which runs from Oct. 4 through Oct. 11—will go to the Michael J. Fox Foundation, and one pair of Nike Mag shoes will also be auction live in three locations: Hong Kong, London, and New York.

You can sign up for the online draw HERE