Decline and fall: what comes after peak wellness?

The social elite are obsessed with devices that track their health but the backlash is building

In fashion, what I hate," Kate Moss told Bella Freud on her Fashion Neurosis podcast, "is when everybody feels they need to make the same bag, or the same dress." Look around and you may notice that a similar bout of mimesis has afflicted the hands of the rich and famous: specifically, a conspicuous ring in plated or matte finish usually worn on the index or ring finger. It is not by Loewe or Chanel but Oura, a sleep-tech company headquartered in Finland. Since no trend has been more ascendant in the past few years than wellness, it was only a matter of time before the jewellery department came under the wellbeing thumb.

The latest model, Oura Ring 4, costs at least £349 with an additional subscription of £70 per annum - a generous Christmas present for anyone who wishes to join this most elite health club. Of the many celebrities and media pundits sporting the status symbol du jour, among the highest profile are Kim Kardashian, Prince Harry, Gwyneth Paltrow and Anthony Scaramucci.