Having fast-tracked their way from spin class to street and even red carpet soirées. The most talked-about trend of the year is performing at peak and showing no signs of slowing down. Lily-Rose Depp, Bella Hadid and Hailey Beiber already count themselves as super-fans. So how did these OG workout shorts become more than just another Kim Kardashian eccentricity?

Bella Hadid via Getty Images
Some could say it’s the influence of the equally cult SoulCycle class that lays claim to Michelle Obama, Lady Gaga and Selena Gomez as ‘riders’. Then there are the internet-favourite '90s flashbacks of Princess Diana strolling Sloane Square in her gym kit with designer bag in tow (what very well may be the first ripples of athleisure). Wherever this smart spin on city dressing was sparked we’re seriously addicted to wearing it with an XXL T-shirt and flossy heels.

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