All of a sudden, I’ve noticed that the chicest dressers across London and France are shelving their jeans in favour of an unlikely skirt pairing. Comfortable, easy and cool, the combination of a slouchy long-sleeve T-shirt and a midi skirt is breaking through as one of the chicest outfit formulas of the transitional months.

Catching my attention this week, I spotted Elsa Hosk in the tried-and-tested pairing. Wearing a slouchy white long-sleeve T-shirt with a white knee-covering skirt, Hosk, crucially, left her top untucked, creating a relaxed, throw-on look that felt inherently cool. And the more I’ve noticed it, the more I’ve realised just how often this pairing has been cropping up lately.

From London to France, the chicest dressers are turning to knee-length skirts to wear with their slouchy tees. Relaxed and unfussy, but a little more considered than the usual denim or shorts pairing, the two-piece formula is perfect for the tricky period between summer and autumn. As temperatures eventually cool, the longer sleeves offer a little extra coverage, whilst the breezier skirt ensures there’s no risk of overheating while the sun is still shining.

Start with a simple black or white T-shirt and switch up your skirt depending on the season and your mood. Crisp white styles feel particularly fresh whilst temperatures remain high, but as we edge towards autumn, try introducing darker shades or a pattern to keep the formula feeling new. When summer finally gives way to autumn, swap flip-flops or ballet flats for knee-high boots—the result will be just as chic.

Intentional yet easy, this is the outfit formula I’ll be relying on for the weeks ahead. Read on to shop the long-sleeve T-shirts and midi skirts I recommend below.

Shop Long-Sleeved T-Shirts and Midi-Skirts: