She talks about wearing it in this video she released on her youtube channel.
https://www.youtube.com/watch?v=F6cFK2szjdg&feature=youtu.be
There was one report Galen Rupp ran a custom 4% spike in January but we hadn't seen confirmation of that anywhere.
Thoughts on the 4% spike? Think more athletes will want to do this or are the supposed advantages of the shoe more suited or the roads?
http://www.letsrun.com/news/2018/06/gwen-jorgensen-wore-custom-nike-vaporly-4-spike-usatf-nationals/