Whilst dresses are a year-round hero, they really come into their own once summer rolls around. Thrown on with simple sandals and a basket bag for city strolls, or elevated for evening with mules and a clutch, the humble dress works extra hard in the summer months. Currently, I'm on the hunt to expand my dress collection, and with an elevated look, timeless aesthetic and high-street price tag on my mind, naturally, I turned to COS. After scouring the brand's stellar dress collection, it quickly became clear that COS has perfectly captured the six key dress trends defining summer 2025.
Whether headed on an island escape or simply navigating the city in the summer, COS has upped its game with its latest dress collection. As a brand, COS is known for high-end looking designs and an innate, understated appeal that sets its pieces apart from the rest.
With temperatures rising, those looking for breezy linen styles will be pleased to explore COS's selection of minis and maxis. The brand always brings a considered finish to its pieces, this summer in particular, with gathered details making the simplest styles feel contemporary. Considering how COS excels in the classics from the best white T-shirt to tailored trousers, it's only natural that it would also turn its hand to the beloved shirt dress—an easy style that has featured in the best wardrobes for years, and will continue to do so.
What consistently draws me back to COS's dresses is that they're eye-catching yet simple. The standout features come in the form of rich shades, considered details like gathered fabrics or an elegant back, and feature a timelessness that ensures you'll be reaching for them year after year. For minimalists, these dresses can pair seamlessly with understated sandals and classic basket bags, and those looking for a bolder look can add accessories to up the ante.
Keep scrolling to explore the six dress trends that are dominating the COS new-in section for summer 2025.
Shop 6 Dress Trends COS Is Backing For Summer 2025
1. The Gathered Dress
This also comes in a vibrant blue, but I'm particularly drawn to the deep brown shade.
Lean on your monochromatic accessories to let this dress be the main event.
There's a serious sense of ease to this sleek dress.
2. The Halterneck Dress
COS does classics incredibly well. The elasticated back ensures this dress fits to the body.
Even though I'm a minimalist, this pink dress has all my attention. Throw on over swimwear when away, or pair with ballet flats and a tote for the city.
COS excels in beautiful silhouettes, and this dress is a prime example of that.
3. The Linen Dress
No matter the year, you'll reach for this sleek linen-blend dress.
Small details done well can completely transform a basic piece. Here, it's the twisted strap.
Keep it simple with monochromatic accessories, or use this black dress as a background for bolder shades.
4. The Bubble-Hem Dress
Everything about this dress looks incredibly high end.
Smarten up the black with monochromatic mules and bold accent jewellery.
The pink version was a best-seller for spring. Now, there's a bold new shade for the summer months.
5. The Throw-On Dress
Looking elegant just got easier with this languid throw-on maxi dress.
The relaxed drape of this dress and soft red shade are a winning combination.
The square neckline brings a polished finish to this easy dress.
6. The Shirt Dress
This simple yet effective shirt dress is already selling fast.
This dress can go from beach cover-up to office look in an instant.
The intricate broderie anglaise details bring a considered feel to this dress.
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