The Y2K revival is nowhere near running out of steam.

Flares are back, pumps were spotted on the London Fashion Week catwalks again, sweetheart necklines are getting fresh wind, bucket hats are even cool – before we know it, combat pants will be on trend once more.

In beauty, skinny eyebrows are on the fringes of making a proper comeback too.

Why do trends come and go out of fashion? Why does something that society turns it back on as uncool later on get a raring revival?

Like clockwork, certain fashion statements fall in and out of favour.

Karine Laudort, fashion trends expert and founder of Kay Flawless, tells Metro.co.uk: ‘Trends circle round as many designers tend to get inspiration from the past whether it is a fashion show, or red carpet looks.

‘Designers may see these past looks as iconic and want to bring them back but with a modern twist to make it fit today’s generation.

‘Also, let’s not forget social media plays a huge part in this.

‘For example, this generation are always going back and being inspired from past looks such as the 90s, particularly TV characters such as Hilary Banks and Ashley Banks from The Fresh Prince of Bel-Air.

‘I would say Instagram, Twitter or even Pinterest have a big role as the youth are constantly bringing the 90s looks to these platforms.’

Depending on your age, different by-gone looks will appeal.

While Gen Z are looking to the 90s right now, millennials and older generations are interested in 70s fashion – think flared trousers and structured shirts and jackets. Trends, which, later inspired 90s fashion.

‘People tend to reminisce and often miss somewhat what once was fashionable during their youth or even, during their parents youth or even completely older eras where fashion classic and timeless pieces were created,’ Karine adds.

This is why you might idolise an vintage item of clothing in your parents’ wardrobe, even if they might not feel quite the same about the style.

So the Y2K revival might seem uncool to millennials, who first wore the style in their childhood – or they may need some more convincing of its attractiveness.

Karine says: ‘Fashion, no matter what year it is, has always been a form of self-expression and story telling.