Athletes wear custom-engineered Nike trainers in attempt to break two-hour marathon barrier
Nike's Unreleased BREAKING2 Shoe Made For Eliud Kipchoge Appears On eBay - SneakerNews.com
Episode 9: World Marathon Records are Falling, Ineos 1:59, Breaking 2, Nike Vaporfly 4%, Mechanical Doping, and more - The Art and Science of Running Podcast