Federer's not-so-green sneakers

"On running" is the Swiss success story of the last decade: a Zurich-based company of sneakers with distinctive soles has teamed up with our country's biggest star, Roger Federer. In this dazzling trajectory, the brand has never stopped betting on surprising marketing. And here's its latest invention: a subscription-based running shoe that claims to be the first to be entirely recyclable and circular. But is it really?