TL;DR — Hemp is a cousin of marijuana — same plant family, almost none of the drug compound. As a fibre it's brilliant: tough as denim, more breathable than cotton, grows fast on barely any water, doesn't need pesticides, and gets softer with every wash. The catch isn't the plant, it's the supply chain. Because the US banned hemp for most of a century, the milling infrastructure mostly vanished. A lot of "hemp" clothing today is still a hemp-cotton blend. But the trajectory is right. Green light, easily — and one to watch.
Quick history detour to start with. Hemp has been spun into clothes, sails, ropes and uniforms for at least eight thousand years. The Declaration of Independence was drafted on hemp paper. The original Levi's jeans were partly hemp. Most of the world's sails — the things that drove the entire age of exploration — were hemp canvas.
Then in 1937, the United States passed the Marihuana Tax Act, which lumped hemp together with its psychoactive cousin and effectively killed the industry. Within a generation, the fabric had disappeared from wardrobes that had used it for millennia. And it didn't come back at scale until the 2018 Farm Bill legalised industrial hemp again in the US.
So when you see "hemp" on a label today, you're looking at a fibre that's only really had about seven years to rebuild a supply chain that took millennia to develop. The early results, frankly, are exciting.
What Hemp Actually Is
Hemp comes from Cannabis sativa — yes, the same species as marijuana, but a different cultivar bred specifically for fibre rather than for THC. Industrial hemp contains less than 0.3% THC. You could smoke an entire field of it and get a headache, not a high.
The fibre lives in the stalks. Like flax (the plant that gives us linen), hemp is a "bast fibre" — the long, strong threads run up the inside of the stem and have to be separated from the woody core through retting and processing. The resulting fibre is one of the toughest natural threads on Earth.
The Fibre Itself Is Brilliant
Set aside the politics for a moment and just look at the fabric properties. Hemp is genuinely impressive:
- Tough as denim. Hemp threads are even stronger than cotton, and a properly woven hemp canvas is borderline indestructible. There are hemp garments still being worn that are decades old.
- More breathable than cotton. The fibre is hollow, like linen, which means air moves through the fabric and moisture wicks away from your skin.
- Grows on barely any water. Hemp needs about half the water cotton requires, and it'll grow on poor soils that wouldn't support most other crops.
- No pesticides needed. The plant is naturally pest-resistant. Most hemp is grown without any sprays at all.
- It gets softer. Unlike cotton (which slowly falls apart) or polyester (which slowly gets crustier), hemp genuinely improves with washing. A five-year-old hemp shirt is softer than a brand-new one.
- Carbon-negative crop. Hemp grows so fast and absorbs so much CO2 that, before you factor in processing, the plant is actually a net carbon sink.
Hemp is one of the very few fabrics where the engineering case, the environmental case, and the comfort case all point the same direction. The only thing standing in the way is half a century of lost infrastructure.
The Supply Problem
So why isn't every shop full of hemp shirts already? This is the honest catch.
Because hemp was illegal in the US (and discouraged in many other countries) for most of the 20th century, the milling expertise and infrastructure mostly vanished. There were no domestic processors. No spinning mills set up for hemp fibre. No retting facilities. No weavers who knew how to handle it at scale. China kept some of the knowledge alive, which is why a lot of today's hemp fabric still comes from there, but Western supply chains are basically being rebuilt from scratch.
That's why a lot of "hemp" clothing you'll see is actually a hemp-cotton blend (often 55% hemp, 45% cotton or similar) rather than pure hemp. The cotton softens the hand-feel, but it's also there because pure hemp is still expensive and limited in supply. The pure stuff exists — and it's wonderful — but you'll pay a premium for it.
The Trajectory Is Right
Here's the good news. Since 2018, small mills have been popping up in the US, Canada, the UK, France and Italy. New mechanical processing techniques are making hemp fibre softer and finer than it used to be. The end-of-life story is gorgeous — hemp biodegrades cleanly in a few months — and several denim brands are quietly switching to hemp blends because the fabric is genuinely better than cotton denim once you've broken it in.
This is not a fabric on its way out. It's a fabric on its way back. The early stuff coming out of the new generation of mills is exciting, and in five years you'll see hemp on a lot more labels than you do today.
The Traffic-Light Verdict
Green light, easily. Hemp is one of the best fabrics you can buy from an environmental standpoint, one of the most durable from a practical standpoint, and one of the most comfortable once it's broken in.
The honest advice: if you see a hemp or hemp-blend garment from a brand you trust, give it a try. It'll feel a bit stiffer than cotton at first. After three or four washes, it'll be your favourite shirt. And you'll be voting with your wallet for a supply chain that genuinely deserves to come back.
Spot Hemp When It's There
Fibr is a free Chrome extension that shows you the fabric composition of every garment — right on the product image — while you browse Zara, H&M, Mango and the rest. So when a "hemp" jacket turns out to be 30% hemp and 70% polyester, you'll know. And when a brand is actually putting real hemp on real shelves, you can give them your money on purpose.