If Birkenstock’s affordable Arizona sandal was fashion’s great equaliser during lockdown, its Boston clog has become the lasting shoe of the pandemic era. The backless loafers, boasting supple moulded footbeds in line with the German footwear giant’s ergonomic design approach, have appeared in Lyst’s hottest product list for the fifth quarter in a row. Balenciaga bags have come and gone, but the Bostons have dug their heels in. Birkenstock is struggling to satisfy demand, and customers are paying upwards of double for pairs on resale sites.

What is it about the slip-on, buckled-up, cork-footbedded flat that’s so appealing? Its austere colourways – “desert dust”, “iron”, “stone coin” anyone? – don’t immediately signal stylish, while its fabrications – from wool felt to micro fibre and oiled leather – are more grandpa-friendly than fashion-forward.

The allure of the affordable Boston lies in its subtle hybridity. Part slipper, part chunky loafer, the lightweight adaptation of an old-school clog symbolises comfort, ease and the unspeakable relief of being able to walk out the door in two seconds wearing a versatile shoe universally seen as stylish.

“In my book, the clog needs no defending,” says British Vogue digital director Kerry McDermott. “Especially when it’s the Boston in taupe, which I’ve been trying in vain to buy for some months now. The characteristically sensible shoe is suddenly infinitely more appealing than any designer stiletto. Life is hard enough without throwing sore feet into the mix.”

Sienna Miller agrees. Ditto Kendall Jenner, Kaia Gerber and Kristen Stewart – a group of women with markedly different personal styles who find common ground in the snug inner and smooth structural outer of the functional Birk. For the former, port-coloured, fleece-lined Bostons are in line with her innately bohemian sense of style. Originally launched in 1979, the cosy-casual clogs were a natural extension of Birkenstock’s sandals, but offered all-weather appropriate toe protection, as well as the orthopaedic benefits of its signature soles. They became a sleeper hit on college campuses in the ’80s and have remained on the periphery of fashion’s subconscious since then.

When brands, such as Dior and Manolo Blahnik, came knocking on Birkenstock’s door, the Boston suddenly levelled up and entered the luxury market. For Jenner, a self-professed granny who finds happiness in quilted Bode jackets and griege Bostons, and her Gen-Z friends, Birkenstocks were no longer a marathon runner’s favourite or a chef’s friend, but had viable fashion credentials. Like us, they bought in and found it hard to give up the podiatric perks once they succumbed to the supportive shoe.