What exactly is a mum blazer we hear you cry! It is of course, a blazer, casually worn as outerwear, most likely with some light-wash jeans and loafers in a non-ironic way, and never as part of a suit (even if it came as one). Yes, that's right, it's time to unleash that tiny little karate-kicking '80s Tom Cruise that lies within you and embrace the powerful combo that is a mum blazer and jeans.
Ok, so maybe it ought to be a little more Cindy Crawford than Tom Cruise but it's still the same principle; masculine, boxy, a muted colour, double points for double-breasted and almost always worn with a white T-shirt for ideal mum-on-duty chic. Bella Hadid is onto it and Rihanna likes to wear hers as a dress.
What's the appeal? It's the perfect blend of The Wolf Of Wall Street yuppie meets Julia Roberts' early '90s airport swag. Wear yours with a merlot lipstick, gold hoops and box-fresh trainers for a modern take on the look – just don't forget to pick up the kids from school.
To ease you into the mum blazer phenomenon, we thought we'd start with something far more fun than frumpy and formal. This short, navy gabardine jacket with a bright red collar and piped pockets is the perfect way to dress up jeans and a T-shirt.
If you think a blazer is more Hyacinth Bucket than high fashion, think again. This belted white jacket is crisp, clean and will add an element of sophistication to your summer wardrobe.
The classic blazer is made modern with a slim lapel, welt pockets and button-detail cuffs. Wear this over leather trousers or cropped jeans and a tucked-in blouse for effortless, everyday chic.
When a grey or black blazer just won't do, enliven your look with an olive green jacket instead. This blazer is one part Princess Di and one part Bella Hadid on the red carpet with nothing underneath and we're into it in a big way.
Ok, ok, few mothers would actually wear this Jacquemus masterpiece with split sleeves and a string detail. If a proper mum blazer is just too mumsy for you, try a more directional option like this navy blue cape/blazer.
Jacquemus 'La Veste Noeuds' jacket, £383.68, available at Farfetch.com
Gucci's bubblegum pink blazer is finished off with mother-of-pearl buttons and flatters the form with a tailored cut. Wear with wide-leg trousers and loafers, preferably not white trousers otherwise the look becomes more Miami Vice than yummy mummy chic.
Gucci Stretch wool and silk-blend blazer £1,060, available at Net-a-Porter
This is very Chloe Sevigny on a down day in NYC. Think boyfriend jeans, oversized black sunglasses, a simple T-shirt, a messy, shaggy do and plenty of attitude.
Monki Tailored Double Breasted Blazer, £40, available at ASOS
This woollen blazer has a masculine fit with structured shoulder pads and the pinstripes make it all the more of an '80s power suit. But don't be put off, wear it over a slip dress with sandals or trainers to bring it firmly into 2016.
A.F. Vandervorst Pinstriped wool blazer, £1,105, available at Selfridges
It can be tricky to find tailoring on the highstreet that fits well but Zara have it down to a fine art with pieces like this versatile black blazer that will slip in seamlessly to every wardrobe.
The ultimate mum blazer, this double-breasted offering from Topshop Unique is chic, sharp and best paired with flared jeans, ankle boots and a simple tee for minimal, casual elegance.
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