The Tencel trunk is starting to make waves — and not just because it’s incredibly soft. Behind this small piece of fabric lies a story that blends nature, technology, and eco-consciousness. Not just underwear, but a real choice that can slightly change your habits (without sacrificing comfort, promise).
In this article, we’ll explore what makes the Tencel trunk different, how it’s made, why it matters, and most importantly, why it deserves a spot in your underwear drawer.
The raw material: sustainably managed forests
Wood from FSC and PEFC certified forests
To make a Tencel trunk, the main raw material is cellulose extracted from wood. This wood doesn’t come from just anywhere: it comes from sustainably managed forests, with certifications such as:
- FSC (Forest Stewardship Council)
- PEFC (Programme for the Endorsement of Forest Certification)
These labels guarantee that trees are harvested with respect for biodiversity, protecting wildlife, plants, and natural cycles.
An eco-friendly alternative to cotton
Unlike cotton, which is very water- and pesticide-intensive (we’re talking about conventional cotton here — organic cotton is another story), the wood used for Tencel grows naturally, often without extra irrigation or heavy chemical treatments. It’s usually eucalyptus, beech, or conifers. It’s a renewable resource, grown in forests where as many trees are planted as are harvested, ensuring responsible management. So, from the start, the raw material of your Tencel trunk already scores points for the planet.
The transformation: an innovative closed-loop process
Clean production and almost zero waste
The secret of Tencel lies in its environmentally friendly manufacturing process. The cellulose is dissolved in an organic solvent which is recovered at over 99% and reused, thus limiting pollutant emissions into water and air. This almost closed loop is the reason why Tencel is often referred to as an eco-responsible fibre.
Tencel can be compared to various types of modal, which are also made from wood cellulose but often under far less environmentally friendly conditions.
Less water, less pollution
While conventional cotton cultivation requires huge amounts of water — sometimes up to 20,000 litres for one kilo of cotton — Tencel production uses far less water, with no pesticides or chemical fertilisers. In addition, the industrial process generates very few toxic emissions, which greatly reduces the overall environmental impact of a Tencel trunk.
From fibre to trunk: how it’s made
Spinning and weaving
Once the fibre is obtained, it is spun and woven into a soft, fluid, and durable fabric. Tencel offers a natural, silky, and breathable texture, ideal for everyday comfort. The fabric is also lighter and wicks moisture better than conventional cotton. And it feels cool to the touch — particularly pleasant in hot weather.
Choosing local production
Where a garment is made plays a key role in its final carbon footprint. A Tencel trunk made in Europe, such as in Portugal, will have a much lower impact than one made in distant countries requiring long transport by plane or ship.
Local production also allows for better quality control, reducing waste and overproduction.
Use and end of life: durability and recyclability
Natural resistance to time and washing
The Tencel trunk stands out for its durability over time. It keeps its shape, softness, and breathability even after many washes. No need to replace it every three months — meaning less consumption in the long run.
Biodegradable and compostable: the real bonus
Unlike synthetic fibres that pile up in landfills for centuries, Tencel is biodegradable.
Overall carbon footprint of the Tencel trunk
A lower impact than cotton or synthetics
Adding up all the stages — from wood cultivation to local manufacturing — the Tencel trunk shows a much lighter carbon footprint than conventional cotton or polyester trunks. The water saved, the reduced emissions, and the choice of local production make all the difference.
Quick recap: why choose a Tencel trunk?
- Wood from certified, renewable, sustainably managed forests
- Closed-loop industrial process with solvent recycling
- Much lower water use compared to cotton
- Local manufacturing reduces transport-related emissions
- Durable, comfortable, and biodegradable fibre
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In short, if you’re looking for underwear that’s both comfortable and more responsible, the Tencel trunk is an option worth considering. You’ll enjoy a fabric that feels great against your skin while making a smarter choice for the planet — because yes, even your underwear can have an impact, so it might as well be a positive one.