Nike just unveiled the newest sneaker in the premier road racing lineup with the debut of the Alphafly 4, shown here.

Available today in limited quantities on Nike’s website is the fourth generation of its top-of-the-line Alphafly marathon racing sneaker.

The Nike Alphafly was developed back in 2017 as part of the brand’s Breaking2 project for Kenyan distance runner Eliud Kipchoge’s attempt to break the two-hour marathon barrier. It took Kipchoge two tries to achieve the historic sub-two-hour marathon, with his first attempt clocking a blazing two hours and 25 seconds in Italy while wearing the Zoom VaporFly Elite in May that year.…