![BBC Sport on Twitter: "π€ What's the deal with these Nike Vaporfly shoes? π€ @samtomharris explains what they are, how they work, and why they have been so controversial... β¬ https://t.co/exHI8UC9ic" / BBC Sport on Twitter: "π€ What's the deal with these Nike Vaporfly shoes? π€ @samtomharris explains what they are, how they work, and why they have been so controversial... β¬ https://t.co/exHI8UC9ic" /](https://pbs.twimg.com/amplify_video_thumb/1223663192766844930/img/ygtUpWPIMRhUkrm2.jpg:large)
BBC Sport on Twitter: "π€ What's the deal with these Nike Vaporfly shoes? π€ @samtomharris explains what they are, how they work, and why they have been so controversial... β¬ https://t.co/exHI8UC9ic" /
![Nike's Vaporfly shoes are fine - but the sport's integrity is at stake if their next version is not banned Nike's Vaporfly shoes are fine - but the sport's integrity is at stake if their next version is not banned](https://www.telegraph.co.uk/content/dam/athletics/2020/01/28/TELEMMGLPICT000222372659_trans_NvBQzQNjv4BqUMKyqgASJ-9H9YMyIowQ0p6vTTzne2C2l27hepmtf28.jpeg)
Nike's Vaporfly shoes are fine - but the sport's integrity is at stake if their next version is not banned
![Nike's Vaporfly shoes are fine - but the sport's integrity is at stake if their next version is not banned Nike's Vaporfly shoes are fine - but the sport's integrity is at stake if their next version is not banned](https://www.telegraph.co.uk/content/dam/athletics/2020/01/28/TELEMMGLPICT000221552234_trans_NvBQzQNjv4BqMGqotqQWTX5jPM9-BXkGCWY1ymtwWO1djvje8pq3aDI.jpeg)
Nike's Vaporfly shoes are fine - but the sport's integrity is at stake if their next version is not banned
![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=465&dpr=1&s=none)
Controversial Nike Vaporflys to escape ban but running shoe rules will tighten | Athletics | The Guardian
![Technological doping: The science of why Nike Alphaflys were banned from the Tokyo Olympics - BBC Science Focus Magazine Technological doping: The science of why Nike Alphaflys were banned from the Tokyo Olympics - BBC Science Focus Magazine](https://c02.purpledshub.com/uploads/sites/41/2021/08/Alamy_2F3Y8J0-crop-ff47efc.jpg?w=1029&webp=1)