Nike designers spent the last four years developing the shoe, which looks like half sock, half traditional soccer shoe. It’s a strange-looking piece of footwear, but this odd form has a purpose.

The first time you slip on a Nike Flyknit–technology that weaves together a shoe’s upper half–you may swear that you’re really wearing a sock. And so as Flyknit technology makes its way to ...

"Designed to inspire unity, symbolize diversity and celebrate Nike and U.S. Soccer ... along with the U.S. Soccer crest front and center like the home kit. The socks for this one are all blue ...