75% cotton, 24% polyamide, 1% elastane

These socks will last a long time: according to our data, socks on the market have a 1 in 10 chance of making it past the 3-year mark... compared to 8 in 10 for ours (more info here)
That said, we have had reports of holes, particularly from people with especially hard nails or who wear safety shoes. For hiking and other intense activities, we recommend using dedicated socks - and not everyday socks like ours.
More likely: small pills may appear on friction areas, particularly 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), it's best 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. on the delicate or synthetics setting) so the sock's elastane doesn't lose its stretch.
Slight pilling may appear in areas of friction, around the Achilles tendon for example. This isn't a sign that they're wearing out: it's just that the cotton fibres working loose (a normal phenomenon) get held in place by the stronger polyamide. If it bothers you, you can run a fabric shaver over them as described in this article.
At first, the socks may feel slightly electrostatic and slip a little in your shoes or on a freshly waxed floor :) With each wash, these effects will fade and the socks will get softer.
And while you're at it, 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 manufacturing "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.

Cotton socks therefore have an environmental cost of 109 impact points*.

By comparison, a garment of equivalent weight, made from 100% conventional cotton, manufactured in Bangladesh and sold by a fast fashion brand, has an environmental cost of 440 points*.

Why this difference? Here are the main reasons:

• The countries of production: manufacturing 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 manufacturing limits the impact on climate change, ocean acidification and resource depletion.
• The material: organic cotton has a fairly low environmental impact compared to conventional cotton, in particular because it uses few pesticides (so low toxicity for freshwater) and because it's biodegradable (so fewer issues with micro-fibres or end-of-life waste).
• Durability: fast fashion brands encourage buying, in particular by renewing their collections very quickly and offering a huge number of items, and they discourage repairs by charging ridiculously low prices. This increases the number of garments sold per person and reduces the number of times a garment is worn. At Loom, on the other hand, we've chosen to adopt commercial 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 31/08/2026. 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 on Ecobalyse (whose method evolves regularly) isn't always exactly the same as on the official environmental labelling (based on version 7.0 of Ecobalyse)