![BBC Sport on Twitter: "🤔 What's the deal with these Nike Vaporfly shoes? 🤔 @samtomharris explains what they are, how they work, and why they have been so controversial... ⬇ https://t.co/exHI8UC9ic" / BBC Sport on Twitter: "🤔 What's the deal with these Nike Vaporfly shoes? 🤔 @samtomharris explains what they are, how they work, and why they have been so controversial... ⬇ https://t.co/exHI8UC9ic" /](https://pbs.twimg.com/amplify_video_thumb/1223663192766844930/img/ygtUpWPIMRhUkrm2.jpg:large)
BBC Sport on Twitter: "🤔 What's the deal with these Nike Vaporfly shoes? 🤔 @samtomharris explains what they are, how they work, and why they have been so controversial... ⬇ https://t.co/exHI8UC9ic" /
![Running: Nike Vaporfly 4% trainers boost elite athletes' performance by up to 1.7%, study finds | Daily Mail Online Running: Nike Vaporfly 4% trainers boost elite athletes' performance by up to 1.7%, study finds | Daily Mail Online](https://i.dailymail.co.uk/1s/2021/04/22/12/42079486-0-image-a-39_1619092422728.jpg)
Running: Nike Vaporfly 4% trainers boost elite athletes' performance by up to 1.7%, study finds | Daily Mail Online
![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
![Nike Vaporfly: BBC Sport explains the technology & arguments about the controversial trainers - BBC Sport Nike Vaporfly: BBC Sport explains the technology & arguments about the controversial trainers - BBC Sport](https://ichef.bbci.co.uk/images/ic/1920x1080/p08237hq.jpg)
Nike Vaporfly: BBC Sport explains the technology & arguments about the controversial trainers - BBC Sport
![Nike's high-tech, record-breaking Vaporfly marathon shoes should be banned, Rob de Castella says - ABC News Nike's high-tech, record-breaking Vaporfly marathon shoes should be banned, Rob de Castella says - ABC News](https://live-production.wcms.abc-cdn.net.au/8cb6c5f08f8285a29b263693bd4f6b1e.jpg?src)