![Controversial Nike Vaporflys to escape ban but running shoe rules will tighten | Athletics | The Guardian Controversial Nike Vaporflys to escape ban but running shoe rules will tighten | Athletics | The Guardian](https://i.guim.co.uk/img/media/f5670c6db81bb06a5192775ad68df5503dafde3e/1191_273_2309_1386/master/2309.jpg?width=1200&height=1200&quality=85&auto=format&fit=crop&s=f0a9eb842cad09baac87d9c701bd3b0f)
Controversial Nike Vaporflys to escape ban but running shoe rules will tighten | Athletics | The Guardian
![World Athletics gives seal of approval for controversial Nike Vaporfly shoes | Athletics | The Guardian World Athletics gives seal of approval for controversial Nike Vaporfly shoes | Athletics | The Guardian](https://i.guim.co.uk/img/media/e0330d85e02744f2f3f5048839c4f4562f58fb45/0_0_3500_2100/master/3500.jpg?width=1200&quality=85&auto=format&fit=max&s=67730f3216754dd7fbeb720e9376def7)
World Athletics gives seal of approval for controversial Nike Vaporfly shoes | Athletics | The Guardian
![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/5b565649b2e231edfd00ebbe32d49e4648b49553/338_640_2787_4832/master/2787.jpg?width=445&quality=85&dpr=1&s=none)
IAAF steps up investigation into fears over springs in Nike running shoes | Athletics | The Guardian
![World Athletics denies tipping off Nike over new running-shoe regulations | Athletics | The Guardian World Athletics denies tipping off Nike over new running-shoe regulations | Athletics | The Guardian](https://i.guim.co.uk/img/media/8dd989f70bc471a8dd2970d87c5338501bb88af1/142_217_3250_1951/master/3250.jpg?width=1200&height=1200&quality=85&auto=format&fit=crop&s=98149160ba44c2da042cd76503c05c40)