If you've landed on this page, it's because you're looking for more clarity on the figures we provide regarding our clothing. Well done, that’s a good instinct.
Here is a brief and simplified explanation of how we found these figures.
To carry out the impact calculations, we used open-source data belonging to ADEME (Agency for Ecological Transition).
We used their ACV Ecobalyse tool, which allows us to obtain the various data on a garment's environmental impact (from a large amount of data, we chose to highlight the carbon footprint, water and fossil energy resource usage, as well as the number of kilometers traveled).
Methodology
We have chosen to compare our clothing with similar products (same cut, weight, etc.), but made from the most commonly used materials for the item in question (e.g., a 100% cotton t-shirt) and following the most widespread production chain for that product (e.g., Indian cotton, Chinese manufacturing, etc.).
Regarding the transport portion, we have simply calculated the total distance our clothes travel, from fiber to finished product, comparing it to the distance usually traveled by a garment in a traditional value chain (we describe each production step of our clothes in the traceability section of the product pages).
The ADEME tool therefore allows us to estimate the impact and compare 2 garments with different materials and value chains in order to estimate their environmental quality.
Limitations
However, we would like to clarify that these figures should be taken as a global estimate and only serve to provide an overview of the validity of our environmental approach. They should under no circumstances be taken as absolute values, as the magnitude of the figures depends on the choices made in the methodology.
Special case
Ecobalyse not allowing for the direct calculation of the impact of our Tencel, Ecovero, and recycled wool products, we relied on data available on the Lenzing website (for Tencel and Ecovero), as well as an LCA study by MWOOL published in 2022 (recycled wool), which note the impact of the production of each raw material.
For these 3 materials, we therefore had to perform a small supplementary calculation, allowing us to get as close as possible to a consistent result without significantly disrupting the methodology.
Sources:
- https://ecobalyse.beta.gouv.fr/#/
- https://www.researchgate.net/publication/360109123_Life_Cycle_Assessment_LCA_of_MWool_Recycled_Wool_Fibers?__cf_chl_f_tk=gAFKJ0NLBFWyVgzAv2YWQFmLa6M8yTiqgBlVIliUF0Y-1783409240-1.0.1.1-vAD918jXCtQCn.3Y21DAXfQB8SyOnD9ULprmw0sUFpY
- https://www.lenzing.com/products/textile-fibers/lenzingtm-ecoverotm/
- https://www.lenzing.com/products/textile-fibers/tenceltm-modal/