100% virgin wool

This overshirt won’t lose its shape at all, thanks to the elastic properties of wool. It might eventually develop some pilling—for example, on the sides from elbow friction—but nothing that a quick pass with a lint shaver can’t fix. The biggest risk is moths if they take up residence in your closet—here’s an article we wrote to help you get rid of them.

Do not machine wash to prevent shrinkage: if you really want to wash this overshirt, you must wash it by hand or take it to a dry cleaner. Note: If you take it to a dry cleaner, be sure to ask for “dry cleaning” (not “water-based cleaning,” which some dry cleaners use and which can cause slight shrinkage).

But you probably don’t need to go that far: on wool, stains usually come out with a quick wipe using a damp sponge (without rubbing too hard, so as not to damage the fabric). Plus, wool is antibacterial: it doesn’t hold onto odors if you air it out regularly.

The label above shows the product’s environmental cost according to the official French environmental labeling methodology. This represents what its production “costs” nature when considering its impact on climate change, ocean acidification, its toxicity to freshwater, and so on. Currently in use in the textile sector, this label should soon appear on many everyday consumer products (food, cosmetics, furniture, etc.) to help you make more eco-friendly purchasing decisions.

The wool overshirt therefore has an environmental cost of 3,373 impact points*.

By comparison, a garment of equivalent weight—made of 100% acrylic, manufactured in Bangladesh, and sold by a fast-fashion brand—has an environmental cost of 3,629 points*.

Why is there this difference? Here are the main reasons:

• Countries of origin: Manufacturing in Portugal or France requires less fossil fuel energy than in Bangladesh (one of the leading producers of low-cost clothing). As a result, this more local manufacturing reduces the impacts on climate change, ocean acidification, and resource depletion.
• The material: Wool has a fairly significant environmental impact, particularly because sheep release methane—a powerful greenhouse gas—during digestion. For this reason, the difference between the environmental impact of our product and that of fast fashion is not very significant. However, unlike acrylic, wool has major advantages: it is warm (thanks to its insulating properties), retains its shape (the fiber is very elastic), breathable (it wicks away sweat), and odor-resistant (it prevents the growth of bacteria).
• Sustainability: Fast-fashion retailers encourage purchasing—in particular by rapidly refreshing their collections and offering a vast number of styles—and they discourage repairs by charging rock-bottom prices. This, in turn, increases the number of garments sold per person and reduces the number of times a garment is worn. In contrast, at Loom, we’ve chosen to adopt business practices that encourage our customers to keep their clothes for as long as possible.

Even though we've done everything we can to minimize it, this product's environmental impact is not insignificant. So before you buy, make sure to get the most use out of your clothes.

*Calculations performed by Loom on August 24, 2026. Click on the links to access the simulations from the official Ecobalyse tool and get more details on the assumptions used. Please note: The number of points is not always exactly the same on Ecobalyse (whose methodology changes regularly) as on the official environmental label (based on Ecobalyse version 7.0).