The black waistcoat has left men's tailoring and moved into the summer wardrobe as a replacement for the white T-shirt. It sounds like one more invention of the fashion industry. This time, surprisingly, it isn't.

The difference is simple: a white T-shirt is neutral, a waistcoat has structure. It draws in the waist, straightens the shoulder line and makes every outfit look deliberate. Same trousers, same sandals - add the waistcoat and the picture changes. That is an effect that doesn't require a new wardrobe, and that is exactly what makes it worth something.

Three ways it works in practice. For an evening event: the waistcoat with an embroidered midi skirt and heeled sandals with metallic details. For the office: with striped satin trousers and ballet flats, plus a large leather bag. For coffee on a terrace: with denim bermudas, flat leather sandals and a woven raffia bag.

Here we should be honest about something. Articles like this always come with a list of prices, and the list is what tells the truth about the industry. A waistcoat for 22.99 euros on sale. A skirt for 69.99. Trousers for 180. A bag for 319 euros, another bag for 254, a belt for 695 euros. One button's worth of inspiration, and the bill for „simple summer style” quietly climbs towards a thousand euros.

The Balkan reader knows this game. The idea is free, the execution isn't - but the good news is that here the idea really is enough. The black waistcoat is the only item on the list that makes a difference. Everything else you already have in your wardrobe, in some version of your own.

That is why it works. It doesn't demand a season, doesn't demand trends, doesn't demand that you change your style. It asks for one piece you'll wear for five years and that will look the same at the end as at the start. The fashion industry lives off the opposite, which makes this recommendation slightly awkward for it - and that is exactly why it's worth taking.