The Journal: Nike's Vaporfly shoe is 'magic.' But is it fair?

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Runners wearing versions of Nike's Vaporfly show have smashed marathon records, leading to questions about whether the shoe offers an unfair advantage. The Wall Street Journal's Rachel Bachman explains the controversy. Learn more about your ad choices. Visit megaphone.fm/adchoices
14 Feb 2020 4AM English South Africa Investing · Business News

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