A pair of Nike "Moon Shoe" waffle racing flats on display in New York City on Monday, July 22, 2019. This rare pair of sneakers sold for 437,500 U.S. dollars on Tuesday at Sotheby's online auction, Stadium Goods: the Ultimate Sneaker Collection. It broke the price record for a pair of sneakers sold at auction. [Photo: VCG/Newscom/Sipa USA/Anthony Behar]"

A pair of Nike "Moon Shoe" waffle racing flats on display in New York City on Monday, July 22, 2019. This pair of flats was purchased by the Canadian entrepreneur Miles Nadal and will be exhibited at his private museum in Toronto. [Photo: VCG/Newscom/UPI Photo/John Angelillo]"

The waffle sole traction pattern of the Nike "Moon Shoe" racing flats on display in New York City on Monday, July 22, 2019. The innovative pattern was designed by Nike's co-founder Bill Bowerman for runners competing at the 1972 Olympic Trials. Only 12 pairs were made, and the pair that sold is the only unworn one. [Photo: VCG/Newscom/Sipa USA/Anthony Behar]"

A pair of Nike "Moon Shoe" waffle racing flats on display in New York City on Monday, July 22, 2019. Their sale broke the record for sneakers, which had been held by a signed pair of Converse worn by Michael Jordan in the 1984 Olympic basketball final. [Photo: VCG/Newscom/Sipa USA/Anthony Behar]"