Hold on to your hoverboards, the NIKE AIR MAG has arrived. A limited number of  the ultra exclusive sneakers, based on the futuristic kicks worn by Michael J. Fox in Back to the Future Part II, are being auctioned off with all the proceeds going to the Michael J. Fox Foundation for Parkinson’s disease research.

The very first pair made available were snapped up for a cool $37,500 by British hip-hop sensation Tinie Tempah at a live auction in Los Angeles last week.  The remaining 1500 pairs are being auctioned off on eBay right now. Each day one hundred and fifty pairs of the 2011 NIKE MAG shoes will be made available via eBay’s Fashion Vault, so now’s your chance to grab a pair and help out a good cause.

The original NIKE MAG was worn by Marty McFly (Michael J. Fox) in Back to the Future II when he visited the year 2015.  In the movie, the shoes lit up, formed to Marty’s foot and self laced. Nike CEO Mark Parker was on the Back to the Future II set in 1988 when Fox donned the original NIKE MAG shoes. He explains the dual purpose of releasing the shoe.

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

The new kicks were created with the original from Back to the Future II in mind.  Nike commissioned designers Tinker Hatfield and Tiffany Beers to bring the iconic shoe into the year 2011 – four years earlier than the movie predicted.  Details that pay homage to the original include the contours of the upper, the glowing LED panel and the electroluminescent NIKE in the strap. The 2011 version feature an electroluminescent outsole with a rechargeable internal battery good for 3,000 hours.

Fox, who played Marty McFly in all three Back to the Future films, went on The Late Show with David Letterman Thursday night to say that he was excited to see three groups of people get excited about the shoes.

“The sneaker-heads who love sneakers, the Back to the Future guys who, believe me, are out of their minds, in a good way, thank God for them. And people in the Parkinson’s community.”