53% virgin wool, 47% cotton

The magic of wool is that it's elastic: this sweater will barely lose its shape. If the sleeves stretch out a bit, you can tighten them with an iron as explained here. 

The magic of cotton is that it's hard-wearing, so there's little risk of holes at the elbows (or only after a long time). If it does happen one day, there will always be time to add elbow patches.

It might pill slightly in areas of friction, for example on the sides... but nothing that a pilling razor can't handle (and the more you remove the pills, the less likely they are to come back).

The biggest risks with this wool sweater are
1- moths, if they settle into your closet! So here's a little article to read here to keep them from moving in with you. And then of course, snags and pulled threads. Our advice: keep your distance from staples and Captain Hook. And if it's too late, here's a little tutorial to repair your sweater.
2- shrinking: if you're not careful when you wash it, the wool can felt and your sweater can shrink. So be sure to follow our washing tips.

WARNING: this sweater contains wool. If you put it in your machine on a regular cycle, it will shrink a lot and become unwearable. So wash it by hand or in the machine on the wool cycle (and definitely not on the delicate cycle, that's a completely different thing), then dry it flat to avoid any misshaping.

The label above shows the product's environmental cost according to the official methodology of the French environmental labelling scheme. It's what its manufacture "costs" nature when you look at its impact on climate change, ocean acidification, its toxicity to fresh water, and so on. Currently rolled out in the textile sector, this label should soon appear on many everyday consumer products (food, cosmetics, furniture, etc.) to help you shop more responsibly.

The lightweight sweater therefore has an environmental cost of 1003 impact points*.

By comparison, a garment of equivalent weight, 100% acrylic, made in Bangladesh and sold by a fast fashion brand, has an environmental cost of 1734 points*.

Why this difference? Here are the main reasons:

• The countries of production: manufacturing in Portugal or France requires fewer fossil fuels than in Bangladesh (one of the main producers of low-cost clothing). The result: this more local production limits the impacts on climate change, ocean acidification and resource depletion.
• The material: wool has a fairly significant environmental impact, in particular because sheep release methane when they digest, a powerful greenhouse gas. That's why the difference between our product's impact and that of fast fashion isn't very large. However, unlike acrylic, wool has big advantages: it's warm (thanks to its insulating properties), keeps its shape (the fibre is very elastic), breathable (it wicks away sweat) and odour-resistant (it prevents bacteria from developing) all at once.
• Durability: fast fashion brands drive purchases in particular by refreshing their collections very quickly and offering a huge number of styles, and they discourage repairs by charging laughably low prices. This increases the number of garments sold per person and reduces the number of times a garment is worn. At Loom, by contrast, we've chosen business practices that encourage our customers to keep their clothes as long as possible.

Even though we've done everything we can to keep it as low as possible, this product's environmental impact isn't negligible. So before you buy, make your clothes last as long as possible.

*Calculations made by Loom on 31 August 2026. Click the links to access the simulations from the official Ecobalyse tool and get more details about the assumptions used. Please note: the number of points isn't always exactly the same on Ecobalyse (whose method evolves regularly) as on the official environmental labelling (based on version 7.0 of Ecobalyse)