Nike is giving people the chance to win a pair of the self-lacing Nike Mag shoes from Back To The Future.
But there'll only be one of the shoes on offer, so whoever gets them is going to have to be lucky.
Unlike in the US and Canada, where anyone in those countries could enter online, the UK raffle can only be entered at Nike Town in London. And it will only be open on 15 and 16 October.
During that time, people will also be able to have a look at the shoes.
People who want to enter the draw pay £10 to do so. All of the proceeds from those entries will go to the Michael J Fox Foundation, and eventually towards working for a cure for Parkinson's.
The draw follows auctions in Hong Kong and London. A pair of the self-lacing shoes was sold at each.
If you miss out, there's one last pair of shoes being raffled in New York, at the Michael J Fox Foundation's benefit gala on 12 November. But given that they've gone for tens of thousands so far – and that the New York auction is likely to be the most well-attended – they're likely to go for a huge sum of money.
In all, 89 pairs of the shoes are being sold. Almost all of them were made available through the US and Canadian raffles.
All entrants to the raffles will find out on 17 October whether they've won a pair.
Nike plans to use the technology from the Mag shoes in other models in the future, though they won't look like thoes from Back To The Future.
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