Daruma Green Store · Training & Gear · ~900 words · 4 min read
You wash it after every session. It still smells by Thursday.
If you train three or more times a week, you know this feeling. You're disciplined about washing — the gi goes in after every session, every time. You let it dry properly. You fold it. And by mid-week, there's still a faint smell that wasn't there when you put it on. It's not overwhelming. But it's there. And over time, it doesn't go away no matter what you do.
We trained like this for years before we understood why. It's not about your washing routine. It's about what the fabric is made of.
The Science — Simple Version
Most BJJ gis are made from cotton, polyester, or a blend of both. Polyester is a plastic-derived synthetic fiber. Under a microscope, its surface is rough and irregular — excellent at trapping things. Sweat. Bacteria. The microscopic organic particles that produce odor.
The problem is what happens when bacteria embeds into polyester fibers. Standard washing cycles — the 30-40°C temperatures most gear labels recommend to avoid shrinkage — don't fully eliminate the bacteria colony once it's established. The bacteria survives. Multiplies. And each time you train, it has a head start. The smell returns faster because the colony is already there, waiting.
The smell isn't about how hard you trained. It's about what your fabric is doing with the bacteria you left behind — even after a full wash.
Cotton behaves better than polyester — it's a natural fiber, it absorbs and releases moisture more efficiently. But it has no inherent antibacterial properties. It's neutral territory. Sweat goes in, bacteria grows, and the pattern compounds with training frequency.
What Hemp and Bamboo Do Differently
Hemp and bamboo are both naturally antibacterial — not because they've been treated with a finishing chemical, but because of the structure of the fiber itself.
Hemp contains compounds that actively inhibit bacterial growth at the surface. Bamboo contains a naturally occurring antimicrobial bio-agent present in the raw plant that partially survives the manufacturing process into finished fabric.
The practical result: bacteria have significantly less to work with during and after training. Less bacterial activity means less odor production. Your gear stays fresher across training sessions — not because of what's been added to it, but because of what it's made from.
- 95% bamboo in our rashguard
- 100% hemp — zero polyester in our gis
- 3x stronger fiber than cotton
- 0 chemical odor treatments
What This Looks Like in Practice
When we started training in hemp gis — before Daruma existed, when we were just two BJJ practitioners looking for better gear — the difference wasn't a single dramatic moment. It built gradually.
The odor that had been a persistent background issue with our previous gis simply didn't accumulate the same way. We still washed after every session — that's non-negotiable. But the residual smell that used to build up over a training week, despite consistent washing, wasn't there.
For the bamboo rashguard, the effect is even more immediate. Polyester rashguards trap heat and sweat against the skin and develop a characteristic smell very quickly, even with regular washing. Bamboo breathes differently. It moves moisture away from the skin more efficiently, and the fiber itself doesn't give bacteria the same environment to establish in.
The Bottom Line
If your gi smells despite washing it after every single session, your routine isn't the problem. The fabric is.
Switching to hemp doesn't change the fact that you need to wash your gear. It changes what happens at the fiber level between washes — and over time, that difference is significant. We built Daruma around this because we were tired of fighting our gear instead of just training.
Train in gear that works as hard as you do.
Hemp Gi + Bamboo Rashguard — ships from EU in 24h.
