78% cotton, 20% polyamide, 2% spandex

Thanks to their thickness and nylon reinforcement, these socks are highly resistant to holes on the soles, heels, and toes. Like all white socks, they may turn gray over time—but you can fix that with sodium percarbonate; see the recipe here.

It’s better to wash them at 30°C than at 40°C: it’s just as effective, much more eco-friendly, and it will extend their lifespan.
To make these socks last longer (and for the sake of the planet), it’s best to air-dry them. But sometimes you have no choice: if you must use a dryer, set it to a low temperature (i.e., delicate or synthetic cycle) so the socks don’t lose their elasticity.
And don’t forget to 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 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.

Ribbed socks therefore have an environmental cost of 167 impact points*.

By comparison, a garment of equivalent weight—made of 100% conventional cotton, manufactured in Bangladesh, and sold by a fast-fashion brand—has an environmental cost of 637 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: Organic cotton has a relatively low environmental impact compared to conventional cotton, particularly because it uses few pesticides (and thus poses a low risk of toxicity to freshwater) and is biodegradable (and thus causes fewer issues related to microfibers or end-of-life waste).
• 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).