Name: SLIM COLLARLESS SINGLE-BREASTED BLAZER
Brand: COS
SKU: 1229679001
Price: 360 DKK
Availability: OutOfStock

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For information relating to environmental qualities or characteristics of this product, you can find

Product sheet relating to environmental qualities or characteristics

We are really pleased to offer you a great range of fashion with a wide selection of cosmetics. However, a few of our cosmetics contain flammable substances and therefore have delivery restrictions. Eg. nail polish, certain perfumes and nail polish removers as well as pressurised spray cans. At the same time, all our beauty items are tested to ensure that they are safe to use. It's only if you wish to return or exchange items containing flammable substances that you need to be aware that there are special transportation requirements.

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Please read our [frequently asked questions](/en-eu/customer-service/faq/).

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We hope you will love everything that you order from us but if something isn't quite right, you have 30 days to send it back to us. 

Please note any purchase made online, from 5th November 2025 - 10th December 2025 can be returned up until 9th January 2026. For purchases made from 11th December 2025 onwards, our normal returns policy will apply. 

We will refund the purchase price, minus a processing fee, using the payment method you chose within 14 days of your return. We ask that items are returned clean, unworn and have all their tags on. 

Please note that items bought online cannot be refunded or exchanged in any of our stores.

We will refund the purchase price, minus a 30 DKK processing fee, using the payment method you chose within 14 days of your return. We ask that items are returned clean, unworn and have all their tags on. 

We hope you will love everything that you order from us but if something isn't quite right, you have 30 days to send it back to us. 

Please refer to our [returns page](/en-eu/customer-service/returns) for more information.

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Blazers

HOW TO MEASURE GARMENT

It's just as easy to return a nail polish as it is to return a pair of jeans.

The easiest way to return any beauty product classified as dangerous goods is to use the original parcel because it already has the LQ.

Dangerous goods label (pictured below). Just make sure to fill the box with paper or filler so the product will stay in place.

We have added this information due to new EU regulations and to give our customers greater transparency about how product prices change over time. Under EU price display regulations, any announced price reduction must indicate the lowest price for a product in the last 30 days – we refer to this as 'lowest historical price'.

Deconstructing classic tailoring, the COS womenswear team have looked to pairing back elements of a traditional blazer. This piece is collarless in design, with most focus on the slim, fitted waist that allows fabric to ripple below. The striking black hue lends itself to the shaped centre-back seam and clean hem, highlighting the structure.&nbsp;Slim fitSingle breasted front button fastening&nbsp;Shell: 38% Linen, 32% Cotton, 30% Elastane. Lining: 100% Cotton. Excludes trims / Machine wash&nbsp;Back length of size EU 36 is 67cm / Model wears a size EU 36

Deconstructing classic tailoring, the COS womenswear team have looked to pairing back elements of a traditional blazer. This piece is collarless in design, with most focus on the slim, fitted waist that allows fabric to ripple below. The striking black hue lends itself to the shaped centre-back seam and clean hem, highlighting the structure.&nbsp;<ul><li>Slim fit</li><li>Single breasted front button fastening</li></ul>&nbsp;Shell: 38% Linen, 32% Cotton, 30% Elastane. Lining: 100% Cotton. Excludes trims / Machine wash&nbsp;Back length of size EU 36 is 67cm / Model wears a size EU 36

SLIM COLLARLESS SINGLE-BREASTED BLAZER

Deconstructing classic tailoring, the COS womenswear team have looked to pairing back elements of a traditional blazer. This piece is collarless in design, with most focus on the slim, fitted waist that allows fabric to ripple below. The striking black hue lends itself to the shaped centre-back seam and clean hem, highlighting the structure.&nbsp;<ul><li>Slim fit</li><li>Single breasted front button fastening</li></ul>&nbsp;Shell: 38% Linen, 32% Cotton, 30% Elastane. Lining: 100% Cotton. Excludes trims / Machine wash&nbsp;Back length of size EU 36 is 67cm / Model wears a size EU 36

Deconstructing classic tailoring, the COS womenswear team have looked to pairing back elements of a traditional blazer. This piece is collarless in design, with most focus on the slim, fitted waist that allows fabric to ripple below. The striking black hue lends itself to the shaped centre-back seam and clean hem, highlighting the structure. Wear with the coordinating <a style="color: #1b1b1b; text-decoration: underline;" href="https://www.cos.com/en_gbp/product.1227478001.html" target="_blank" rel="noopener">mini skirt</a> or <a style="color: #1b1b1b; text-decoration: underline;" href="https://www.cos.com/en_gbp/product.1214207003.html" target="_blank" rel="noopener">maxi skirt.</a>&nbsp;<ul><li>Slim fit</li><li>Single breasted front button fastening</li></ul>&nbsp;Shell: 38% Linen, 32% Cotton, 30% Elastane. Lining: 100% Cotton. Excludes trims / Machine wash&nbsp;Back length of size EU 36 is 67cm / Model wears a size EU 36

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Product contains at least 0% recycled materials.

We've updated our sizes based on your feedback. Please refer to the size guide.

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Turns on / off additional Material Information in PDP drawer

Azure Insights Telemetry for nextjs, both frontend and backend

Turning this on will allow an Inactivity trigger (when user is returning) for an extra selection call to Centra

Enables the Ingrid delivery address locking functionality in checkout, which allows the delivery address section to be locked to prevent changes.

Used to to display debug info from components using <Debugger> - Prod here is irrelevant as it can only be featureflag toggled for lowe environents

FeatureFlag that is determines ReviewsDrawer Version

Feature Flag to enable/disable reviews functionality in My Account application area.

worked together with clientDegubOverlay to display data around how long since last interactivity

Flag that enables Digital Order Return feature
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- Order Return Block on different pages

Controls if PDP delivery and returns sidebar shows Ingrid delivery estimation time widget or content from Storyblok.

Disable preorder on lower environments. Preorder cannot be disabled on PROD.

testflag to show debugger in action provided clientDebugOverlay flag also is avalilable. Will never work in Production (only limited to lower Environments)

[Deprecated] Flag that will enable the use of the new elevated components as part of the Elevation project.

Used to enable/disable the option for overriding the navbars sticky behaviour in page settings.

Flag that will enable the use of the new elevated footer as part of the Elevation project.

Flag that will enable the use of the new elevated navigation as part of the Elevation project.

FF for elevated size select buttons/selector

Controls display of elevated quickshop drawer

Enables browser-based API mocking using MSW (Mock Service Worker) for local development, testing, and preview environments. When active, network requests are intercepted and served with mock data, improving frontend development speed and reliability. Disable in production.

Enabled PDP stock check call caching. Cache control headers will be set to 1 min.

Enables the new Wishlist API service as the storage backend. When this flag is true, the app persists and reads wishlists via the backend service.  When false, it uses the client-side cookie storage.

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When enabled it doubles PLP revalidation and caching time (will be set to 20 mins)

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Allow COS App to use FHR AB Test caching instead of directly passing sessionID.

Controls whether Klarna payment options are displayed as separate, selectable payment categories or as a single consolidated payment method.

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Why it exists: Satisfies consumer protection regulations requiring transparent pricing history, helping customers make informed purchasing decisions and compare price trends.

Purpose: Enables unit pricing display for multipack products to meet regulatory compliance requirements.
What it does: When enabled, displays the calculated price per individual item for multipack products (e.g., "£5 / piece" for a £10 two-pack).
Why it exists: Satisfies consumer protection regulations requiring transparent unit pricing to help customers compare products sold in different quantities.

Our new Product Details Drawer using tabs 

Will trigger extra attention around size-guide, a red-text-button that animates, and notification messages in Wishlist and in the opend size-guide drawers

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Flag to enable test countries.
As of today (2024-07-19) these are:
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Flag to enable test markets. 
As of today (2024-07-12) these are: 
CH, ES, FR, GB, IE, IT, NO, PL, SE

This flag is for new turbo cookie compliance

Use Upper Case (instead of lower / sentence case) in the product Card Titles