Applicable products: Netmarkets

📣 Decathlon - News - October 2025 - New mandatory attributes

The marketplace Decathlon is launching a new taxonomy campaign focusing on attributes.

Before the end of October 2025, you must complete newly mandatory attributes to ensure your products remain online.

What is changing

Decathlon is making the following changes in product attributes: 

  • The main material of the product becomes mandatory for Apparel and Shoes categories.
  • Mandatory GPSR attributes are available to provide your products' manufacturer information (legal requirement for non-food products).
  • In the Apparel accessories category, a new size attribute replaces another one, with fewer valid values.
  • Specific "Best for Sales" attributes become mandatory for certain categories (apparel, socks, shoes, bikes, etc.) to improve product visibility, and valid values have been updated.
  • For Food and beverages products, the list of flavors has been updated and certain values will be deleted.
  • For Treadmills, 3 new free-text attributes are required, to provide the length and width of running surface, and the maximum speed.

The detailed list of changes is available here 

Decathlon allows merchants several weeks to adapt to the changes before the attributes become mandatory. 
All merchants must complete the required attributes by 31st October 2025.

What you have to do in Lengow

Advice: We recommend reading the email and the documentation provided by Decathlon about this taxonomy update.

Decathlon is planning the completion campaign between the 29th of September and the 31st of October 2025. 

The new attributes and values are already available in Lengow, but are not marked as mandatory yet. 
The outdated ones will be removed after the completion period.

Main material

In Lengow, complete the "main material CHARACTERISTIC_395" attribute for your Apparel and Shoes products, by selecting a valid value from the drop-down menu. 
To map you values with Decathlon's, we recommend creating a conversion list.

GPSR

To comply with the General Product Safety Regulation (GPSR), you must provide to Decathlon the following information about your products through attributes available in Lengow: 

  • "GPSR - Trademark" (mandatory): Enter the manufacturer’s registered trade name or trademark
  • "GPSR - Manufacturer's postal address" (mandatory): Enter the postal address of your products' manufacturers or the person responsible within the EU.
  • "GPSR - Manufacturer's name" (mandatory): Enter the name of your products' manufacturers or the person responsible within the EU
  • "GPSR - Manufacturer's email address" (mandatory): Enter the email address of your products' manufacturers or the person responsible within the EU.
    OR the link to a contact form to send a message to the manufacturer.
  • "GPSR - Warning/Safety information" (optional but recommended):  One attribute per language/country. Free text to give all details about safety information.
  • "GPSR - Warnings" (optional but recommended): List of values you can choose from if your product is matching one of these warnings.
     

Sizes (Apparel accessories)

For your products in the Apparel accessories categories, you must remap the size attributes using the new size attributes, starting with "SIZES".

Example: For belts, the "SIZE_CPN_100" attribute will be replaced by the ""SIZES_CPN_100" attribute. 
Read Decathlon's documentation here

Flavors

Check the updated list of flavors provided by Decathlon, and modify your mapping of the "Flavors" attribute in Lengow accordingly, as deleted values will be removed at the end of the campaign.

Treadmill

In Lengow, provide the following information for your treadmills (as free values):

  • "Length of running surface" (in cm)
  • "Width of running surface" (in cm)
  • "Maximum speed" (in km/h)
     

"Best for Sales" attributes

Some attributes are becoming mandatory and/or valid values have been modified for the following categories: Apparel Top & Bottom, Socks, Shoes, Scooters, Bikes, Tent & Rooftop tent and Backpack.

In Lengow, make sure to complete the newly required attributes and update values, as detailed in Decathlon's documentation

Original message

We're launching a new taxonomy campaign to create a better purchasing journey and optimize your products visibility !

To know all changes and what you'll have to do, read the following newsletter and check the full documentation here

Note that you'll have to update your content between the 29th of September and the 31st of October.

If you still have doubts, feel free to book a meeting with us !

  • Main material (Generic attribute)

Targeted status: Mandatory 

We are working on the optimization of our product information for our customers. For Apparel and shoes, we have identified the main material as a critical data to share.
It will allow us to create ecommerce filters and increase the visibility of your products.

This attribute will become mandatory
Please update your products to fit with conformity chart
More info here ->

  • GPSR (Legal requirement)

Mandatory data for non-food products

To be GPSR compliant, we created new dedicated attributes in which you are obliged to share your Consumer Goods General Product Safety Regulation-data

Multiple attributes will become mandatory
Please fill these attributes to be GPSR compliant
More info here->

  • UPDATE: Sizes (Apparel accessories)

New attribute with cleaner list of values

New size attribute for 31 categories to:
- Limit the number of values
- Have standard values per category

You need to remap all your products in these 31 categories
Size lists that are easier to use
More info here ->

  • UPDATE: Flavors values 

Cleaning of values: deletion of duplicates

Data owners have cleaned the values available for flavors to delete duplicates and have a more efficient list. Please, check if you're using the right values.

Multiple values will be deleted
Please update your content with the right values (based on the mapping attached)
More info here ->

  • TREADMILL: Legal requirements

Semi-free attribute that will become mandatory

New attribute type: you will have a specified unit that you must follow but the content will be free (rather than a list of values). We start with Length and width of running surface, and Maximum speed for all treadmills.

New attribute will become mandatory
Please update your content for all your treadmills
More info here ->

  • Best for sales - List of attributes to fill for better online experience (Multiple categories)

Set of attributes and their values have been reworked to match best for sales information for several categories: Apparel Top & Bottom, Socks, Shoes, Scooters, Bikes, Tent & Rooftop tent, Backpack.

Multiple attributes will become mandatory
Please fill these attributes for your products in the affected categories.  
More info here ->

Let's meet !
You read the documentation and still have questions regarding this campaign? You can book a meeting with us!
Book a meeting here

-

Articles in this section

News, Services & Incident reports
Discover updates, webinars, and expert services to help you get the most from Lengow