Why This Crossbody Bag Went Viral This Fall

Emma Caldwell
September 18, 2026

Mini bags still have their place, but this season there’s an evident shift. Designs that truly fit everything are back—the soft leathers, the less rigid shapes, and those silhouettes that seem to improve the more you use them. And if they also come in brown, one of the colors that has the most presence this autumn, they have a good chance of becoming the accessory around which to build any look.

The way to carry them has also changed. In contrast to overly recognizable designs, simple bags without large logos and with design as the main lure are gaining ground. Models that can accompany over the years a pair of jeans and a blazer, but also a long coat or a dress.

The COS viral bag that has everything to succeed

It is an oversized leather flap bag. It’s a design that costs 249 euros and that sums up quite well what we’re looking for now in an everyday bag. It has a large, lightly relaxed silhouette, a huge front flap and is made from an especially soft leather.

The protagonism is in the shape of the bag, in how the leather falls and in proportions that make it, despite its simplicity, not go unnoticed. It features a metal clasp, a lined interior and a removable strap that allows you to carry it both in the hand and as a crossbody bag.

And then there’s the color. The model arrives in espresso, a dark brown especially easy to pair and that works as an alternative to the classic black bag. With gray, navy blue, camel, beige, burgundy or even with an all-black total look, it adds a bit more warmth without overly limiting the possibilities.

Why it fits so well with today’s looks

One of its strong points is precisely that it doesn’t require an overly elaborate styling. With straight jeans, a fine-knit sweater and loafers it already works. It can also be worn with wide-leg dress trousers and an oversized blazer, or accompanying a long coat when the temperatures drop.


Crossbody bag in black by COS.

Its size also means that the bag itself sets the ensemble. And that partly explains why XL silhouettes are making a comeback: they allow you to transform very simple basics without needing to resort to particularly flashy accessories.

Another design that will go viral

Another option that follows that same line is this medium-sized napa leather bag by Massimo Dutti, available in black for 149 euros. It’s made from sheep leather and combines a fixed shoulder strap with a crossbody strap, which makes it especially practical for everyday use.


Leather bag in black by Massimo Dutti.

Its design is much more restrained than that of the Trullo, but it shares that clean, uncluttered aesthetic that’s defining the season’s bags. Additionally, the zipper closure and the cotton-lined interior reinforce that idea of a functional accessory, designed to carry much more than the essentials.

Emma Caldwell
Emma Caldwell
I’m Clara Desrosiers, a writer and fashion editor based in Toronto. I founded Backdoor Toronto to explore the intersection of fashion, identity, and culture through honest storytelling. My work is driven by curiosity, community, and a love for the creative pulse that defines this city.