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This Viral COS Bag Won’t Stay in Stock, But It’s Being Restocked

Lumjer Editorial/September 19, 2026/4 min read
This Viral COS Bag Won’t Stay in Stock, But It’s Being Restocked

COS may have just created its next cult handbag. Meet the Trullo: oversized, understated and already proving difficult to get your hands on.

Every so often, a high-street bag arrives that manages to break out of the usual seasonal cycle and become something much bigger. COS has done it before, and now the Swedish brand appears to have another hit on its hands.

The COS Trullo Flap Bag has quietly become one of the most talked-about bags of the moment, with its relaxed silhouette, oversized proportions and remarkably expensive-looking finish earning it plenty of attention online. The style landed at COS in August and quickly sold out in several versions, with fashion editors, stylists and shoppers all taking notice.

And it isn't difficult to understand why.

The COS Trullo Has Serious Designer Energy

At first glance, the Trullo looks like the sort of bag you'd expect to find several floors above COS in a luxury department store.

Rather than relying on logos or obvious branding, the design is defined by its shape. The leather folds naturally around the body of the bag, creating a soft, slightly slouchy silhouette. A slim strap and understated metal fastening add just enough structure without disturbing its minimalist feel.

It also happens to bear more than a passing resemblance to one of fashion's most desirable luxury bags: the Balenciaga Rodeo.

The Rodeo has become increasingly visible over the past few seasons thanks to its deliberately relaxed shape and discreet design. Unlike the instantly recognisable logo bags of years past, its appeal lies in looking quietly luxurious. The COS Trullo taps into much of the same aesthetic at a dramatically different price point.

COS's standard Trullo has been priced around €199, while the larger oversized leather version has retailed for approximately €249, depending on the market. By comparison, Balenciaga's Rodeo sits firmly in four-figure territory.

The Oversized Version Might Be the Best One

While smaller handbags aren't disappearing entirely, fashion's obsession with impractically tiny bags has definitely cooled.

The current mood is bigger, softer and far more functional.

That makes the Trullo Oversized Flap Bag particularly interesting. Its generous proportions turn what could have simply been another minimalist shoulder bag into an actual everyday carryall. The oversized version is wide enough to accommodate a laptop alongside all the other things that usually end up scattered between your handbag and a separate tote.

Yet it doesn't look like a traditional work bag.

That might be its biggest strength. Worn over an oversized wool coat, tailored trousers and loafers, it feels polished enough for the office. Pair it with faded denim, a white T-shirt and flats and the same bag suddenly looks completely effortless.

It's the sort of accessory that doesn't require you to construct an outfit around it.

Why Everyone Suddenly Wants One

The Trullo arrives at exactly the right moment.

Some of fashion's most compelling bags right now aren't covered in hardware, monograms or instantly recognisable branding. Instead, they're roomy, slightly undone and designed to look as good casually thrown over a shoulder as they do carefully styled.

That shift has helped make styles such as Balenciaga's Rodeo so desirable — and created space for more attainable versions of the same aesthetic.

COS is particularly good at operating in that space. Its bags tend to avoid obvious trend details, which allows them to feel current without immediately looking dated once the season changes.

The Trullo follows exactly that formula.

It doesn't scream for attention. It doesn't need an enormous logo to make an outfit look expensive. And perhaps most importantly, it actually fits more than a phone and a lipstick.

Is This COS's Next It Bag?

Considering how quickly the Trullo disappeared after arriving online, it may already be well on its way.

The bag has attracted comparisons with luxury houses including Balenciaga and The Row, while its combination of real leather, minimalist design and comparatively accessible pricing gives it the sort of crossover appeal that has turned previous COS accessories into cult favourites.

Of course, fashion's most viral pieces rarely stay easy to find for long.

So if you've been looking for a spacious everyday bag with the feel of a four-figure designer purchase — without actually making a four-figure designer purchase — the COS Trullo might be one worth keeping an eye on.

Something tells us we'll be seeing a lot more of it this autumn.