Bamboo has become a favorite fabric for pajamas, bedding, baby clothes, and everyday loungewear. All for good reasons. It has a famously smooth feel, naturally helps manage moisture, and creates the lightweight, comfortable fabric many people love sleeping in.
But there's a question that doesn't get nearly enough attention:
How does a hard bamboo stalk become the incredibly soft fabric we know as bamboo viscose?
The answer is a little more complicated than "bamboo becomes fabric".
Bamboo viscose is a regenerated cellulose fiber, meaning the cellulose from the bamboo plant is processed and transformed into a fiber. That transformation requires chemistry. However, naturally, using chemicals to produce a sustainable and skin-friendly fabric like bamboo viscose seems concerning. Or like "greenwashing".
At Earthly Threads, we believe everybody deserves to understand what goes into the fabrics they wear and sleep in—not just the beautiful end result.
So let's take a closer look at bamboo viscose: how it's made, what chemicals are involved, what OEKO-TEX® certification actually means, and what all of this means for the fabric against your skin.
Bamboo the Plant Isn't the Same as Bamboo Viscose
Let's start with the most important distinction.
A bamboo stalk is not a piece of bamboo fabric.
Bamboo is a hard, woody grass. You can't simply harvest a stalk, spin it into silky yarn, and sew it into pajamas. To create the smooth, drapey fabric used in most bamboo clothing and bedding, the cellulose inside the plant must be extracted and regenerated into textile fabric.
This is where the term bamboo viscose comes from.
The Federal Trade Commission explains that when bamboo is chemically processed into rayon or viscose, the resulting fiber should be identified as rayon or viscose made from bamboo. In other words, the bamboo plant is the source of the cellulose, while viscose is the fiber that ultimately becomes the fabric.
Let's break it down:
Bamboo plant → cellulose → processed pulp → regenerated fiber → yarn → fabric
That transformation is what gives bamboo viscose its signature softness.
How Is Bamboo Viscose Made?
This is where things get interesting. While manufacturing processes vary, conventional bamboo viscose production generally involves several stages. The bamboo is harvested, chipped, and processed into cellulose pulp. The cellulose is then chemically treated so it can be dissolved and regenerated into extremely fine fibers.
The basic process looks something like this:
1. Bamboo is harvested
Bamboo stalks are harvested and prepared for processing. Unlike cotton, which produces a soft fiber around the plant's seeds, bamboo is a woody grass. Its cellulose needs to be extracted before it can become textile fiber.
2. The bamboo is broken down into pulp
The stalks are chipped and processed by crushing the stalks to separate the cellulose from other components of the plant.
At this stage, we're still nowhere near the buttery-soft fabric you know from bamboo pajamas.
3. Chemistry transforms cellulose
If you were wondering whether chemicals are involved in the making of bamboo viscose, the answer is yes.
The conventional viscose process involves using chemicals to turn cellulose into a solution, which can then be regenerated into fiber. The process commonly involves substances such as sodium hydroxide and carbon disulfide, followed by additional processing that turns the cellulose solution back into solid filaments.
4. The cellulose is regenerated into fiber
The processed cellulose solution is pushed through tiny openings called spinnerets, specialized nozzles consisting of hundreds of microscopic holes. This then forms long filaments. Those filaments are then washed and processed into the yarn used to create textiles.
5. The fiber becomes fabric
Finally, the regenerated fibers are spun into yarn and woven or knitted into the soft textiles used for clothing, pajamas, sheets, and more.
And that's how you go from a hard, woody stalk to a soft, flexible bamboo viscose fabric.
If Chemicals Are Used, Is Bamboo Fabric Safe?
This is the question that matters most. And the honest answer is:
The fact that chemicals are used during manufacturing does not, by itself, tell you whether the finished fabric is safe.
Think about the difference between manufacturing chemicals and what remains in the finished textile.
Many manufacturing processes use substances that wouldn't be healthy to have directly against your skin. The important question is what happens during processing, finishing, washing, and testing. And, of course, whether the final textile meets established safety requirements.
This is where certifications come in and the one reason why they matter.
What Does OEKO-TEX® Certification Actually Mean?
This is where we think consumers should pay close attention.
You may have seen the OEKO-TEX® STANDARD 100 label on bamboo pajamas, bedding, clothing, and other textiles. But what does it actually mean?
It does not mean that no chemicals were ever used during manufacturing.
Instead, OEKO-TEX® STANDARD 100 is a certification for textiles that have been tested for harmful substances and meet defined safety requirements. The testing applies from yarn through finished products, and the requirements become stricter depending on the product's intended use and degree of skin contact.
| OEKO-TEX® Product Class | Intended Use |
|---|---|
| Class I | Products for babies and children up to 3 years |
| Class II | Products with extensive direct skin contact, such as underwear and bed linens |
| Class III | Products with less direct skin contact |
| Class IV | Home and decorative textiles |
OEKO-TEX® describes Class I as having the strictest requirements and limit values because it applies to products intended for babies and toddlers.
What OEKO-TEX® Does (and Doesn't) Tell You
Transparency also means being clear about what a certification does and doesn't promise.
OEKO-TEX® STANDARD 100 tells you that:
- The certified textile has been tested for harmful substances.
- The product must meet the specified limit values.
- Testing requirements account for the intended use of the textile.
- More intensive skin contact means stricter requirements.
- Baby products are subject to the strictest product class.
It does not mean:
- No chemicals were used during manufacturing.
- Bamboo viscose is produced without chemical processing.
- Every bamboo product on the market is made the same way.
- A bamboo plant's natural properties automatically remain in the finished viscose fiber.
That last point is especially important.
Bamboo's Natural Benefits vs. Bamboo Viscose's Properties
There's another misconception worth clearing up. You may hear bamboo described as naturally antibacterial or antimicrobial because the bamboo plant possesses certain properties.
However, once bamboo cellulose has been chemically processed into regenerated viscose, you shouldn't automatically assume the finished textile retains every property of the original plant.
The FTC specifically warns brands against making unsupported claims that rayon made from bamboo retains the plant's natural antimicrobial properties.
Why Does Bamboo Viscose Feel So Soft?
This is one reason bamboo viscose has become so popular for sleepwear and bedding. The manufacturing process creates a regenerated cellulose fiber with a smooth hand feel and a soft drape. That's very different from the original bamboo stalk.
The softness isn't because the bamboo stalk was naturally soft. It's because the cellulose has been transformed into a fine textile fiber, and that's a fascinating part of textile science. The same plant that begins as a rigid stalk can ultimately become the lightweight, silky fabric you wear to bed.
Why Certification Matters When Shopping for Bamboo
If you're shopping for bamboo pajamas, sheets, or clothing, don't stop at the word "bamboo." Make sure to look at the details behind it.
A response shopping checklist might look like this:
| What to Look For | Why It Matters |
|---|---|
| Specific fiber labeling | Helps you understand whether you're buying viscose/rayon made from bamboo or another type of bamboo fiber |
| OEKO-TEX® STANDARD 100 | Indicates that the textile has been tested for harmful substances according to the standard's requirements |
| Appropriate product class | Requirements vary according to intended use and skin contact |
| Transparent brand information | Gives you a clearer picture of how and where products are made |
| Specific, substantiated claims | Helps distinguish meaningful information from vague “eco-friendly” marketing |
The FTC requires accurate labeling for bamboo-derived rayon and viscose products, while OEKO-TEX® provides a framework for testing textiles for harmful substances.
What This Means for Earthly Threads
At Earthly Threads, we love bamboo for what it can offer as a textile: softness, comfort, moisture management, and a beautiful feel against the skin.
Still, we believe that you don't have to describe something as "chemical-free" to recognise its worth.
Bamboo viscose is chemically processed. That's the truth. The important distinction is what happens throughout that process and what is present in the finished textile.
Our bamboo textiles are OEKO-TEX® certified, meaning the certified products have been tested against the applicable OEKO-TEX® requirements for harmful substances. OEKO-TEX® explains that its testing evaluates textiles according to their intended use, with stricter requirements for products with greater skin contact.
We think that's worth being transparent about, because you shouldn't have to choose between comfort and honesty. We're all about comfort without compromise.
The Bottom Line: Is Bamboo Fabric Safe?
Yes, bamboo fabric can be a safe choice when it is responsibly manufactured, and the finished textile meets established safety standards.
Bamboo viscose is not made without chemicals, and we don't want to tell you otherwise. The process uses chemicals to transform cellulose from bamboo into a regenerated fiber that can be spun into the soft, flexible fabric used in pajamas, loungewear, and bedding.
But the fact that chemicals are used during manufacturing doesn't automatically mean the finished fabric is unsafe. What matters is how the fiber is processed, how the finished textile is tested, and whether a brand can substantiate its safety and quality claims.
For Earthly Threads, that's why OEKO-TEX® certification is important.
We're not interested in pretending bamboo is magically grown, spun, and turned into pajamas with no chemistry involved. We'd rather tell you how it's actually made and let you feel good about what you're buying because you know the full story.
Ready to experience bamboo for yourself?
Explore our collection of luxuriously soft bamboo pajamas, loungewear, and bedding designed to bring comfort to your everyday routine and elevate your lifestyle.
