0805ゼッケン774さん@ラストコール
2019/06/07(金) 21:56:49.25ID:a/0elyXbKirby has also been working closely with Bret Schoolmeester, senior director for
Nike’s global running footwear, to design a new shoe for the attempt, which will be
known as the Vaporfly 40%. Each shoe is equipped with four carbon springs — two each
in the forefoot and heel — as well as miniature turbojets attached to the back of the heel.