![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=900&quality=85&auto=format&fit=crop&s=3d3d5104fecad732c750effdfeedfa85)
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 Controversial Nike Vaporflys to escape ban but running shoe rules will tighten | Athletics | The Guardian](https://i.guim.co.uk/img/media/7d713612df69bdb0ecb5470ddfb0debf0da053a9/0_186_5568_3341/master/5568.jpg?width=300&quality=85&auto=format&fit=max&s=5ed632d77e4b9cfb3c0eee390ddb474f)
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 Controversial Nike Vaporflys to escape ban but running shoe rules will tighten | Athletics | The Guardian](https://i.guim.co.uk/img/media/cd5028aec63018abb528de2fe821c7ff82274fe0/472_487_3616_2169/master/3616.jpg?width=460&quality=85&auto=format&fit=max&s=c48131c85170d49649a803c4e7382a1d)
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 Controversial Nike Vaporflys to escape ban but running shoe rules will tighten | Athletics | The Guardian](https://i.guim.co.uk/img/media/352ee47384e9443776e7037f652a24a64119866c/4_754_1653_992/master/1653.jpg?width=300&quality=85&auto=format&fit=max&s=936c98cebd6e8c9b065f0cce0a172cb8)