90% cotton, 10% polyester

The joggers will stay in good condition and will never pill.
You may notice a slight loosening at the knees by the end of the day—which disappears after washing.
The black color will fade slightly with washing (as with all cotton clothing).
If used intensively for sports, it may develop holes in areas subject to friction (such as the crotch) more quickly than 100% polyester sweatpants.

Tie a knot in the drawstrings before putting it in the washing machine; otherwise, they might get lost inside the waistband.
It’s machine-washable at 40 degrees, but it’s better to wash it at 30°C: it’s just as effective, much more eco-friendly, and it’ll extend the garment’s lifespan. Next, be sure to wash it inside out to prevent discoloration and any risk of pilling.

You can put it in the dryer (it happens…), but if you do, use a low temperature (i.e., delicate or synthetic cycle) so it doesn’t lose its elasticity.The best way to ensure its longevity and be kind to the planet is to dry it flat on a drying rack or towel.

Of course, it’s cotton, not Kevlar: despite our best efforts, there may be very slight shrinkage after the first wash. Don’t worry—this is normal and will stabilize afterward. If you find that the joggers stretch out a bit, a quick spin in the washing machine should tighten the knit and restore its original feel.

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.

Jogging therefore has an environmental cost of 1,154 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 4,948 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).