The heavyweight t-shirt
Released in December 2023
Released in July 2025
- Switched to a set-in collar, which sits better on the neck and holds up better over time.
- We inserted a few (recycled) polyester filaments into the collar for even better durability over time. We use as little synthetic material as possible: we only turn to it when it significantly extends a garment's lifespan, and here, there's no contest.
We use organic cotton because so-called "conventional" cotton is a disaster for insects, birds and farmers. More info in this article.
Full composition: body 100% organic cotton, collar 80% organic cotton 20% recycled polyester (to reinforce it).
This t-shirt is thicker than classic t-shirts (which usually weigh between 120 and 180 g/m2). This gives it a nice drape and better durability over time: with cotton jerseys, the heavier the fabric, the less it loses its shape (see our test results).
If you're looking for a lighter t-shirt, take a look at our classic t-shirt.
The cut is slightly loose without being oversized. If you're looking for a more fitted cut, take a look at our classic t-shirt.
For this t-shirt, we used an "open-end" yarn, a spinning technique invented in the 70s that binds the fibres firmly together. The result is a slightly irregular feel and texture, like the beautiful t-shirts you find in vintage shops.
This t-shirt is made in Portugal, at the Triwool factory we've been working with since 2017.
Worn, tested and approved by thousands of customers, this t-shirt is the result of several years of continuous improvement. We've refined it over time to reach a balance of quality, ethics and price that we now consider optimal. For example, to lower the price, we could have it made in Asia or North Africa, but that would come at the expense of the working conditions of the women who make it.
The techniques behind the quality
Reinforced collar
After seven years of improving our t-shirts, we've managed to develop a collar structure that won't warp wash after wash, thanks to several polyester filaments inserted inside the collar.
Reinforced collar
Open-end yarn
Pre-washed
Open-end yarn
This spinning method gives the fabric a dry hand feel. The upsides: no pilling (because the fibres are tightly intertwined) and no twisting (because the yarn isn't retwisted on itself, unlike the classic "ring-spun" method).
Reinforced collar
Open-end yarn
Pre-washed
Pre-washed
This t-shirt is stabilised and pre-washed at the factory so it won't shrink at home (with cotton clothing, most of the shrinkage happens during the first wash).
Reinforced collar
Open-end yarn
Pre-washed
A thick t-shirt with a straight cut
This t-shirt is thicker than average: we made it with a chunky “open-end” (organic) cotton yarn, a spinning technique invented in the '70s that tightly tangles the fibres together. The result is a slightly irregular feel and grain, like the great t-shirts you find in vintage shops. And thanks to this yarn, the fabric holds its shape better than lighter t-shirts. The cut is straight for more comfort and a modern look.
In detail
Set-in collar
The collar is lined and secured with a double topstitch for a better hold.
Neck tape
The reinforcement tape runs the full length of the shoulder line: it lasts longer over time, and it helps the t-shirt sit nicely across the shoulders.
Printed label
To avoid scratching your neck or damaging the fabric with the attachment seams.
Natural ecru
The ecru colour doesn't come from any dyes — it's the natural shade of the (organic) cotton. By skipping the dyeing step, we not only get a fabric with real texture, but we also do away with a whole lot of chemicals and greenhouse gases.
How to wear it
A few ideas if you're stuck
Composition
Body: 100% cotton
Collar: 80% cotton 20% polyester
Origin and certifications
... make it in Portugal and not in France? Of course, producing in Portugal lets us sell at a lower price. But it's also easier to achieve good quality there: in the 80s, when France offshored its industry, Portugal strengthened its own. That said, others do manage to make excellent t-shirts that are 100% made in France, like 1083 or Le Slip Français.
…does the yarn come from so far away? We looked for a good-quality organic cotton yarn, produced as close as possible. We would have preferred a Portuguese spinning mill but, as far as we know, there's no factory making "compact" 100% plain cotton yarn certified GOTS in the country.
... does the cotton come from so far away? Truth is, cotton always comes from far away: while a handful of die-hard Gauls manage to grow it in their fields, cotton farming is marginal in Europe.
How this product will age
How do we know? We ask our customers what they think of the product one year after they've bought it. And if the product is less than a year old, we give you our predictions based on some spontaneous feedback and on our experience with similar products.
Thanks to its heavy weight, this t-shirt will keep its shape well. Thanks to its open-end yarn with tightly tangled fibres, it won't pill. And since the yarn wasn't twisted during spinning, it will barely skew.
That said, its irregular texture may become more pronounced wash after wash, as it does on some vintage t-shirts. Over time, the collar may lose its shape slightly. And, as with all 100% cotton garments, the colours will fade over time and the white may yellow because of deodorants and perspiration (but our customers have managed to fix this every time with soda percarbonate — tutorial here).
Care instructions
Don't overthink it, it's a t-shirt: wash it inside out at 30°, with similar colours, and everything will be just fine.
Environmental cost
This environmental cost is calculated using the official methodology of the French environmental labelling scheme (in force since 1 October 2025).
The label above shows the product's environmental cost according to the official methodology of France's environmental labelling scheme. It's what its production "costs" nature when you look at its impact on climate change, ocean acidification, its freshwater toxicity, 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 heavyweight t-shirt therefore has an environmental cost of 572 impact points*.
By comparison, a garment of equivalent weight, 100% conventional cotton, made in Bangladesh and sold by a fast fashion brand, has an environmental cost of 2424 points*.
Why the 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 production limits the impacts on climate change, ocean acidification and resource depletion.
- The material: organic cotton has a fairly low environmental impact compared with conventional cotton, mainly because it uses few pesticides (so low toxicity for freshwater) and is biodegradable (so fewer issues with microfibres or end-of-life waste).
- 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 absurdly 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 taken the opposite approach: business practices that encourage our customers to keep their clothes as long as possible.
Even though we've done everything we can to make 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 performed by Loom on 14 September 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)
Reviews for this product
The standard practice is to send review request e-mails a few days after the purchase. We wait a month, the minimum time needed to form a well-informed opinion
Customer review policy
When do you ask customers for reviews?
We send you a review request one month after you receive your order. We reckon that's the minimum amount of time needed to have worn and washed a garment several times and to really form a well-informed opinion. After that, all your reviews are published within the week, whether they're good or not.
Do you ask for reviews on 100% of the products customers order?
We used to do that at first, then we realised we were starting to send far too many emails to some people who buy from us regularly. In short, we were spamming a bit. On top of that, it was starting to take up way too much of the team's time to reply to reviews - since we want to reply individually and privately to almost every person who leaves us a review. Today, we no longer ask for reviews on products that meet the following two criteria: 1/ There are enough reviews shown on the site for people who want to buy to form a well-informed opinion about the product 2/ We've read enough reviews within the Loom team to understand how to improve the product for the next generation.
Hold your horses: what proves we don't tamper with reviews by slapping 5 stars everywhere?
Honestly: nothing, we're just giving you our word. Same as for everything else, by the way: where we manufacture, where our wool comes from, our lab test scores, and so on. The only times we might touch what you write are if your message contains spelling mistakes (and even then, quite a few slip past us) or if it's racist, homophobic, and so on (but that's never happened so far).
Asking for a review after a month isn't enough to know whether the clothes really are durable, is it?
You're right, which is why we send you another review request email a year after your purchase – we even ask for a photo to see how your garment has aged. The answers help us improve our clothes and provide information about "how this product will age" on our product pages. To avoid bothering our customers needlessly, we don't ask for these reviews on 100% of the products ordered: as soon as we have enough data to understand the areas for improvement, we stop asking for the one-year reviews.