(KRON/CNN)—Nike is raffling off 89 pairs of its “Back to the Future” sneakers.

The special-edition Nike Mags are replicas of the self-lacing sneakers worn by Marty McFly in the iconic “Back to the Future” movie.

Tickets for the online lottery are $10 and can only be purchased by U.S. and Canadian customers.

The lottery closes on October 11th and winners will be notified about a week later.

All proceeds from online lottery ticket sales for the kicks will be donated to the Michael J. Fox foundation.

The non-profit is working to find a cure for Parkinson’s disease.

Actor Michael J. Fox, who played McFly, suffers from Parkinson’s.