Nike Air Mag Shoes Launches On eBay Nike has unveiled its Back to the Future-inspired “Air Mag” shoes, which will be auctioned from Sept. 8 until Sept. 18. 1,500 pairs of the shoe will be sold on eBay, or 150 per night through the 10 days.

All proceeds will go to the Michael J. Fox Foundation for Parkinson’s disease research.

“We wanted to translate the excitement people have for the ‘greatest shoe never made’ and for the Back to the Future into positive action,” said Nike CEO Mark Parker. “But the long term objective is to raise awareness so the Foundation can achieve their goal of eradicating Parkinson’s disease.”