68% wool, 31% polyamide, 1% elastane

These socks will age very well and get holes far less quickly than regular socks. That said, some people with particularly sharp toenails or who wear safety shoes have told us about holes appearing over time.
Some pilling may appear in areas of friction, especially around the Achilles tendon... but nothing a fabric shaver can't handle (tutorial here).

It's better to wash them at 30°C than at 40°C: it's just as effective, far greener, and it'll extend their lifespan.

To make these socks last longer (and for the planet), the best thing is to air-dry them. But sometimes you don't have a choice: if you have to use a tumble dryer, do it on low heat (i.e. delicate or synthetic mode) so the sock's elastane doesn't lose its stretch.

As your shoes rub against them, some pilling may appear, especially in areas like the Achilles tendon or the sole. Actually, that pilling is a good sign: the layer of polyamide we added wears down to delay the moment a hole shows up in the wool. 

At first, the socks might feel slightly staticky and slip a little in your shoes or on a nicely polished wooden floor :) With each wash, these effects will fade and the socks will get softer.

And here are a few last tips for the road. Don't iron them, to avoid loosening up the elastane. Wash them inside out so hairs or lint from other clothes don't cling to the outside of the sock. Trim your toenails. And wear shoes (they were invented for a reason).

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 for freshwater, 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.

Wool socks therefore have an environmental cost of 179 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 287 points*.

Why the difference? Here are the main reasons:

• The production countries: making clothes in Portugal or France requires less fossil fuel than in Bangladesh (one of the main producers of low-cost clothing). The result: this more local production limits the impact on climate change, ocean acidification and resource depletion.
• The material: wool has a fairly significant environmental impact, mainly because sheep release methane as they digest, a gas with a strong greenhouse effect. That's why the difference between our product's impact and that of fast fashion isn't very large. However, unlike acrylic, wool has major advantages: it's warm (thanks to its insulating properties), keeps its shape (the fibre is very elastic), breathable (it wicks away perspiration) and odour-resistant (it prevents bacteria from developing).
• Durability: fast fashion brands drive purchases 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, we've done the opposite: 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 you possibly can.

*Calculations performed by Loom on 31/08/2026. Click 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 method evolves regularly) as on the official environmental label (based on version 7.0 of Ecobalyse)