I'm seriously considering wearing my pyjamas to work. Because "pyjama dressing" is now an actual fashion thing, with its own name. So there is a god. It's been, ahem, a sleeper hit since Rihanna wore hers while out in New York last year. In February, Dolce & Gabbana held a pyjama party in LA attended by Jessica Alba and Nicole Richie. Meanwhile the suit formerly known as sleepwear has become a fashion-week street-style hit.

There are provisos of course: you can't just front up in any old unicorn onesie and expect to be taken seriously. But in printed crepe de chine, striped twill or piped satin, the button-up PJ shirt is big news.

Retailers from Witchery and Country Road to Zara and ASOS are proposing such pieces, but how does the ethical fashionista embrace the trend?

Firstly, let's think of this as a lifestyle choice rather than a fad – I think that's achievable; our fashion culture is already pretty relaxed. From bed to bar. Sounds good to me. Plus the wide-legged palazzo pant is a classic that never gets tired.

A bit more affordable is the small-scale Italian luxury brand, For Restless Sleepers. Designer Francesca Ruffini makes beautiful, quality PJs to be seen in. Her prints are exclusive and she sources her silk from Como, where mills have been weaving silk cloth since the 15th century.