Diana's iconic 'USA' sweatshirt is now available to buy for £23 on Etsy

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The past year in lockdown has seen loungewear evolve into our stylish everyday uniform of choice – with even M&S creating an entire section dedicated to it thanks to soaring pandemic sales.

But if you want to add some fashion kudos into your laidback looks, look no further than Diana, Princess Of Wales' cool 1990s sweatshirts.

You can now get your hands on an almost-identical version of the late royal's iconic 'USA' jumper – which she was photographed wearing on a trip to her gym, at the Chelsea Harbour Club, in April 1997.

The slouchy, white classic-fit garment, emblazoned with the American flag, is available to buy for £22.93 on Etsy.

It is described on the site as a "sturdy and warm sweatshirt" designed to keep you cosy on chillier summer days thanks to "air-jet spun yarn".

Those who have already purchased the item appear very pleased with their deliveries.

One revealed that she was "obsessed" with the oversized style, while a second shopper praised the quality and "loved" how comfy it was.

Diana, who passed away aged 36 in August 1997, was frequently snapped arriving at her exercise sessions wearing one of an array of branded sweatshirts.

As well as the 'USA' option, Etsy also have in stock another sweatshirt that has gone on to become even more famous.

Diana's navy 'Fly Virgin Atlantic' jumper is also available to order for £23.50.

The original – which was a gift from Sir Richard Branson – sold for £42,700 at auction in 2019.

It was emblazoned with the airline’s retro 'Flying Lady' logo, which was first inspired by Peruvian painter Alberto Vargas’ sketches of pin-up girls in the 1930s.

The mother of Prince William and Prince Harry would repeatedly arrive at the gym wearing the garment as a sneaky way to stop the paparazzi getting new pictures of her.

Read more: Diana's wedding dress 'set benchmark for royal brides' says expert

Shortly before her tragic death, the princess gave the sweatshirt to her personal trainer and longtime friend, Jenni Rivett.

She wrote a touching note alongside the present, which read: "Dearest Jenni, lots of love from, Diana, x".

The sweatshirts have been much celebrated by the fashion world over the years, including by Hailey Bieber for Vogue Paris in 2019.

As demonstrated by the model, the royal would often finish off her look with now very on-trend gold hoop earrings, cycling shorts and chunky trainers.

Watch: Royal weddings through the years