Two hour marathon: Furore erupts over Nike Vaperfly shoe worn by Eliud Kipchoge | news.com.au — Australia's leading news site
![IAAF steps up investigation into fears over springs in Nike running shoes | Athletics | The Guardian IAAF steps up investigation into fears over springs in Nike running shoes | Athletics | The Guardian](https://i.guim.co.uk/img/media/f5670c6db81bb06a5192775ad68df5503dafde3e/1191_273_2309_1386/500.jpg?quality=85&auto=format&fit=max&s=276ab9433541144885ff39ff2a752bd9)
IAAF steps up investigation into fears over springs in Nike running shoes | Athletics | The Guardian
Two hour marathon: Furore erupts over Nike Vaperfly shoe worn by Eliud Kipchoge | news.com.au — Australia's leading news site
![IAAF steps up investigation into fears over springs in Nike running shoes | Athletics | The Guardian IAAF steps up investigation into fears over springs in Nike running shoes | Athletics | The Guardian](https://i.guim.co.uk/img/media/278bf5db6b5a9f9ccb47f686bc3a94c9e7c9495b/326_192_1100_660/master/1100.jpg?width=1200&quality=85&auto=format&fit=max&s=18ec27c6924bfe70544e8ac7288a4f7b)