Name: THE ESSENTIAL SILK SHIRT
Brand: COS
SKU: 1221534002
Price: 66 USD
Availability: OutOfStock
Rating: 3.5 (2 reviews)

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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 pressurized 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.

We deliver to all states including P.O. boxes, but we are unable to ship APO/FPO/DPO addresses or US Territories.

Some fragrance products are classed as dangerous goods and therefore cannot be delivered to the below locations:

4-7 business days. Orders placed Monday–Friday will be delivered within 4–7 business days. Orders are delivered Monday–Saturday to residential and commercial addresses.

Economy Shipping 

 3-5 business days. Orders placed Monday–Friday will be delivered within 3–5 business days. Orders are delivered Monday–Saturday to residential addresses and commercial addresses.

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1-2 business days. Orders placed by 12pm EST Monday to Friday will ship out same day and be delivered within 1-2 business days. Orders placed after 12pm EST will be shipped out next business day and delivered within 1-2 business days. Orders placed after 4pm EST on Friday will be delivered on Tuesday at the earliest. We don’t offer Express shipping service to Alaska and Hawaii at this time.

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This item cannot be returned as it is part of final sale

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

Questions?

We’ve extended our returns period over the festive season to offer more flexibility when you shop online. Any orders placed between November 1, 2025, and December 24, 2025, can be returned up to and including January 31, 2026. 

We hope you will love everything that you order from us but if something isn’t quite right, you have 30 days from the purchase date to return any full-price item(s) and 14 days from the delivery date to return any sale item(s) that are not marked 'Final Sale' for a full refund to the original payment method for the order. We ask that items are returned clean, unworn and have all their tags on.

A $5 return fee will be deducted from your refund should you choose to use the prepaid label included with your order.

We hope you will love everything that you order from us but if something isn’t quite right, you have 30 days from the purchase date to return any full-price item(s) and 14 days from the delivery date to return any sale item(s) that are not marked 'Final Sale' for a full refund to the original payment method for the order. We ask that items are returned clean, unworn and have all their tags on.

A $5 return fee will be deducted from your refund should you choose to use the prepaid label included with your order.



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

Returns

This label is used to inform the carrier that the package contains flammable substances and has special transportation requirements.

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.

This piece is part of the COS ATELIER capsule, where specialised craft and innovative applications combine to create a refined collection.&nbsp;CUTSleek yet sophisticated, this shirt has been precisely cut on our regular-fit block and leans into minimalism with its pointed collar, straight shape and clean-cut hem. The box-pleat detail lends subtle movement.&nbsp;CLOTHWe selected the tactile mulberry-silk cloth for its unparalleled quality. The midnight-navy hue only amplifies its enduring feel.&nbsp;CRAFTNote the wide placket that conceals the mother-of-pearl buttons and the double-layered elongated cuffs. These cuffs are adjustable for a personalised fit.&nbsp;Shell: 100% Mulberry silk. Excluding trims / Dry clean&nbsp;Back length of size EU 36 is 80.5cm / Model wears a size EU 36

This piece is part of the COS ATELIER capsule, where specialised craft and innovative applications combine to create a refined collection.&nbsp;CUTSleek yet sophisticated, this shirt has been precisely cut on our regular-fit block and leans into minimalism with its pointed collar, straight shape and clean-cut hem. The box-pleat detail lends subtle movement.&nbsp;CLOTHWe selected the tactile mulberry-silk cloth for its unparalleled quality. The midnight-navy hue only amplifies its enduring feel.&nbsp;CRAFTNote the wide placket that conceals the mother-of-pearl buttons and the double-layered elongated cuffs. These cuffs are adjustable for a personalised fit.&nbsp;Shell: 100% Mulberry silk. Excluding trims / Dry clean&nbsp;Back length of size EU 36 is 80.5cm / Model wears a size EU 36

THE ESSENTIAL SILK SHIRT

This piece is part of the COS ATELIER capsule, where specialized craft and innovative applications combine to create a refined collection. CUTSleek yet sophisticated, this shirt has been precisely cut on our regular-fit block and leans into minimalism with its pointed collar, straight shape and clean-cut hem. The box-pleat detail lends subtle movement. Wear it with the <a style="color: #1b1b1b; text-decoration: underline;" href="https://www.cos.com/en_gbp/product.1226296001.html" target="_blank" rel="noopener">matching ATELIER pants</a>. CLOTHWe selected the tactile mulberry-silk cloth for its unparalleled quality. The midnight-navy hue only amplifies its enduring feel. CRAFTNote the wide placket that conceals the mother-of-pearl buttons and the double-layered elongated cuffs. These cuffs are adjustable for a personalized fit. Shell: 100% Mulberry silk. Excluding trims / Dry clean Back length of size 6 is 80.5cm / Model wears a size 6

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We've updated our S,M and L sizes based on your feedback. Please refer to the size guide.

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Please note, stock levels may vary. For further information, please contact the store.

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Merchandise purchased online at a discount of 50% off or more is considered Final Sale. Items purchased as Final Sale are not eligible for return, exchange or credit without exception and merchandise is sold as is.

We hope you will love everything that you order from us but if something isn’t quite right, you have 30 days from the purchase date to return any full-price item(s) and 14 days from the delivery date to return any sale item(s) that are not marked 'Final Sale' for a full refund to the original payment method for the order. We ask that items are returned clean, unworn and have all their tags on.




Any questions? Please visit our [returns](https://www.cos.com/en-us/customer-service/returns) page. 


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Microsoft.Targeting

Turns on / off additional Material Information in PDP drawer

When enabled, it monkey-patches the Adyen SDK's Drop-in component to intercept payment method selections and reads it back on the checkout success page to show the human-readable payment method name.

Enables automatic logout for authenticated users when changing countries to prevent cross-market session issues.

Azure Insights Telemetry for nextjs, both frontend and backend

Enables direct communication with the BFF for customer settings (get and update) instead of going through the legacy API proxy. Falls back to the legacy path when disabled.

Controls whether Canada (CA) market is included in hreflang meta tags for SEO.

Default: false (disabled)

Behavior:
Disabled (default): Canada is excluded from hreflang tags. Use this during the initial Canada launch phase when only a landing page is available and all other pages redirect.
Enabled: Canada is included in hreflang tags alongside other production markets. Enable this once Canada has full page coverage and no longer redirects users to a landing page.

Use case: Prevents search engines from indexing Canada-specific hreflang alternates until the market is fully launched with complete page support.

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.

Bypass checkout/login and take user directly to CIAM page

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

coming soon feature flag is to enable/disable the feature.

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
- Link Button on My Account Order History
- Order Return Block on different pages

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

Blocks plaintext email addresses in newsletter URL parameters (unsubscribe, double opt-in). When enabled, URLs must use hashed emails with bpId. Phone numbers remain allowed in plaintext.

Blocks plaintext emails in Double Opt-In confirmation URLs. Requires hashed emails with bpId. Phone numbers remain allowed in plaintext. Enable only after Emarsys includes bpId in DOI emails.

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)

Switches on/off ecomID SizeFinder and SizeAlert widgets functionality on PDP

[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.

Switches My Account orders/returns data source from Centra GraphQL to ESCI API Gateway. Both paths produce the same unified types. 

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

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

This feature flag can be used to toggle support for faceted navigation on PLPs.

feature flag that is deciding which version of find in store drawer 

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

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As we deprecate Headless UI , radiobuttons are first up to switch to Radix. Turn off on this feature flag if we want to fallback to Headless UI as fallback

Purpose: Enables historical price display for products to meet regulatory compliance requirements. 
What it does: When enabled, shows the previous price alongside the current price for applicable products, allowing customers to see price changes over time. 
Why it exists: Satisfies consumer protection regulations requiring transparent pricing history, helping customers make informed purchasing decisions and compare price trends.

When enabled, uses the ParcelLab test country code (xt) instead of the actual user country code for the Digital Returns widget.

https://hmgroup.atlassian.net/browse/PBCDE-12822

https://hmgroup.atlassian.net/browse/PBCDE-9156

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

Validates checkout state integrity during payment processing by comparing server-calculated hash with client-provided hash, preventing payment when checkout data has changed between user confirmation and payment API call to ensure accurate orders.

If enabled, the Storyblok Cache service endpoint will be used to proxy Storyblok requests. Note: Not all envs have the endpoint configured so may not affect them.

Enables tracking the origin of newsletter subscriptions by attaching touchpoint metadata to Customer API, identity provider, and Tealium payloads.

Flag to enable test countries.
As of today (2024-07-19) these are:
BE, CY, GR, HR, LU, PT

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