WHAT'S INSIDE? on Twitter: "It's almost time. How many @nike Joyride Balls are in one shoe? Video Premiering in 30 mins, its a looong one, come join the chat:) https://t.co/bwFuzVgvvK https://t.co/ZgWYuFuXob" /
The science behind Nike's new Joyride Run Flyknit | WIRED UK