The combination sounds odd said out loud - a dress over trousers. But this is exactly what became the formula Spanish women reach for this summer instead of the classic summer dress. A satin slip dress thrown over wide, light trousers. It looks careless, and it is anything but.

The idea is nothing new at the big houses - Victoria Beckham and Chloé have been pushing this layered, romantic overlap for years. What is new is that it has now come down to the street and into the collections you can actually afford. Zara introduced it last summer and keeps offering it - which means the formula survived more than one season, a rare stamp of approval in a world where trends last about as long as a single scroll.

Why does it work? The satin falls in diagonal lines that visually lengthen the legs, and the light fabric creates that carefree elegance summer keeps asking for. The discreet shimmer carries through day and night - the same piece serves lunch and dinner, no changing required.

There are three ways to wear it. For evening - the dress over tailored trousers, gold sandals and a small bag, for that "quiet luxury" that whispers rather than shouts. For a relaxed look - over wide, laid-back jeans, where satin and denim argue nicely: sensuality versus comfort. And for a boho line - over voluminous trousers in neutral tones, sand, ivory, beige.

In the end, this is a trick that promises more than it asks. You do not need a new wardrobe - you need one dress you already own and trousers already hanging in the closet. Sometimes fashion is not in buying something new, but in seeing the old with a different eye.