• by Sarah Mahoney  @mahoney_sarah, September 12, 2011

Hang on to your flux capacitors, kids: Nike says it is finally selling the shoes that "until now, have only existed on the feet of Marty McFly."

The Beaverton, Ore.-based Nike says it is auctioning off 1,500 pairs of the footwear first seen in "Back to the Future II" in 1989, with proceeds going to benefit the Michael J. Fox Foundation and its fight against Parkinson's. The Nike MAG shoes rely on an "electroluminescent outsole, space-age materials and a rechargeable internal battery good for 3,000 hours," brags the foundation's website. "And while they are not recommended for playing sports, these highly limited shoes will very likely command attention wherever they are worn."

The 10-day effort, which launched last week, will raise funds by auctioning off 150 pairs of shoe per day on eBay, with all net proceeds going directly to the foundation.

"We wanted to translate the excitement people have for the 'greatest shoe never made' and for Back to the Future into positive action," says Mark Parker, Nike CEO, who was on the Back to the Future II set in 1988 when Fox donned the original NIKE MAG shoes, in the company's release. "But the long-term objective is to raise awareness so the Foundation can achieve their goal of eradicating Parkinson's disease."