Viscose, often known as rayon, occupies a strange middle ground in the textile world. It is neither fully natural like cotton nor fully synthetic like polyester. Instead, it is a chemically regenerated fiber made from wood pulp. While it dominates fast fashion racks due to its silk-like drape and low cost, the hidden reality of its production and its performance in your wardrobe tells a different story. In 2026, as the industry faces increasing scrutiny over its environmental footprint, understanding why viscose is often labeled as "bad" requires looking past the soft texture to the harsh chemistry and ecological impact behind it.

The physical failure: Why your viscose clothes don't last

One of the primary reasons consumers find viscose problematic is its poor durability. From a textile science perspective, viscose has a low "wet modulus." This means that when the fibers become wet, they lose a significant portion of their structural integrity—sometimes up to 50% of their strength.

This structural weakness leads to several common household frustrations. When you wash a viscose garment, the water molecules penetrate the cellulose chains, breaking the temporary hydrogen bonds that hold the fabric's shape. As a result, the garment may shrink dramatically or, conversely, stretch out in odd directions if hung to dry while heavy with water. This is why so many viscose items carry "Dry Clean Only" labels; the material simply cannot handle the mechanical stress of a standard washing machine cycle without degrading.

Beyond shrinking, viscose is notorious for pilling. Because the fibers are relatively short and smooth, they easily migrate to the surface of the fabric during wear, tangling into small, unsightly balls. For a consumer looking for longevity, a viscose shirt is often a disappointment, frequently becoming unwearable after just a few months of regular use. In a world increasingly focused on reducing textile waste, a fabric designed for such a short lifespan is inherently problematic.

The chemical nightmare: Carbon Disulfide and worker health

The transformation of solid wood into a soft, wearable fiber is not a natural process. It requires a heavy industrial chemical treatment known as the "viscose process." The wood pulp is treated with caustic soda and then reacted with carbon disulfide (CS2) to create a viscous solution that can be spun into threads.

Carbon disulfide is a highly toxic, volatile liquid. Historically and in many modern production facilities with poor regulations, exposure to this chemical has been linked to severe health issues for factory workers. Chronic exposure can lead to nervous system damage, including symptoms like peripheral neuropathy, memory loss, and in extreme cases, psychosis. There is also a documented correlation between carbon disulfide exposure and increased risks of coronary heart disease and birth defects.

While the finished fabric you buy at the mall no longer contains dangerous levels of these chemicals, the people who manufactured the fiber often pay a high physical price. In many regions where environmental and labor laws are loosely enforced, the discharge of these chemicals into local waterways and the air further compounds the damage, poisoning local ecosystems and the communities that rely on them.

The deforestation crisis hidden in your closet

Because viscose is made from cellulose, it requires massive amounts of wood. While trees are a renewable resource, the way the fashion industry sources this wood is frequently unsustainable. Every year, millions of trees are cut down to feed the global demand for man-made cellulosic fibers (MMCFs).

Large portions of this wood pulp are sourced from ancient and endangered forests, particularly in regions like Indonesia, Brazil, and the Canadian Boreal. The clearing of these forests leads to massive habitat loss for endangered species and displaces indigenous communities. Even when plantations are used, they are often monocultures—large areas of a single tree species like eucalyptus—which lack the biodiversity of a natural forest and deplete the soil of nutrients while requiring heavy pesticide use.

Although organizations like Canopy have made strides in tracking the supply chain, a significant portion of the global viscose market remains untraceable. This lack of transparency means that a "natural" feeling dress could be contributing directly to the destruction of some of the world's most vital carbon sinks.

The "Bamboo Viscose" greenwashing trap

Perhaps the most common misunderstanding regarding viscose involves bamboo. Many brands market "bamboo fabric" as an eco-friendly miracle, touting bamboo’s fast growth and lack of need for pesticides. However, unless the label specifies "bamboo linen" (which is rare and feels quite rough), that soft bamboo fabric is actually just bamboo-derived viscose.

To turn a hard bamboo stalk into a soft t-shirt, it must go through the exact same toxic chemical process described earlier. By the time the bamboo is dissolved in carbon disulfide and extruded through a spinneret, none of the original natural properties of the bamboo plant remain. The resulting fiber is chemically identical to viscose made from pine or beech trees.

Regulatory bodies, such as the FTC, have even issued warnings to retailers for misleading consumers by labeling these products simply as "bamboo" instead of "bamboo viscose" or "rayon made from bamboo." The environmental benefits of the raw bamboo plant are largely nullified by the pollution generated during the manufacturing stage.

Energy and water: A resource-heavy journey

The production of viscose is incredibly resource-intensive. It is estimated that producing one ton of viscose requires approximately 3,000 cubic meters of water. This is not just for growing the trees, but for the multiple stages of washing and chemical processing required to refine the cellulose.

Furthermore, the energy required to power the factories, heat the chemical baths, and dry the fibers is substantial. Because many viscose factories are located in countries that rely heavily on coal for electricity, the carbon footprint of a viscose garment can be higher than that of some synthetic fibers. When you combine high water consumption with chemical pollution and high energy use, the "natural" argument for viscose begins to fall apart.

Is there such a thing as "Good" Viscose?

It is important to note that not all viscose is created equal. Technology has advanced to allow for "closed-loop" production systems where chemicals are captured and reused rather than dumped into the environment.

  • Lyocell (often branded as Tencel): This is a much better alternative. It uses a non-toxic solvent (amine oxide) and a closed-loop system that recovers 99% of the chemicals and water used. It is also stronger than standard viscose, both wet and dry.
  • Lenzing EcoVero: This is a branded version of viscose that follows much stricter environmental standards. It uses certified sustainable wood sources and has significantly lower emissions and water impact compared to generic viscose.
  • Modal: While similar to viscose, Modal (often made from beech trees) goes through a slightly different process that results in a stronger, more shrink-resistant fiber. However, it still requires careful sourcing to be truly sustainable.

If a garment label simply says "Viscose" or "Rayon" without any specific branding or sustainability certification (like FSC or OEKO-TEX), it is safe to assume it was produced using the cheaper, more polluting methods.

How to handle the viscose you already own

If you find your wardrobe is already full of viscose, the most sustainable thing you can do is make those clothes last as long as possible.

  1. Wash less frequently: Since water is the enemy of viscose, only wash garments when absolutely necessary. Spot cleaning is often enough.
  2. Cold water only: Heat further weakens the fibers and encourages shrinking. Use the most delicate cycle on your machine or, better yet, hand wash.
  3. Avoid the dryer: The high heat of a tumble dryer is the fastest way to ruin a viscose item. Lay the garment flat on a towel to dry. Never hang wet viscose, as the weight of the water will cause it to stretch out of shape permanently.
  4. Iron with care: If the garment looks wrinkled and stiff after air drying, use a cool iron or a steamer to relax the fibers and bring back the original drape.

The 2026 perspective: Shifting away from generic Rayon

As we move through 2026, the fashion industry's reliance on generic, cheap viscose is becoming increasingly hard to justify. With the rise of recycled cellulose fibers—made from textile waste rather than virgin wood—the excuses for continued deforestation and chemical pollution are thinning.

For the conscious consumer, "bad" viscose is characterized by its anonymity. When you see a cheap, silky garment with no information about its origin, you are likely looking at a product of high environmental and social cost. By choosing alternatives like Lyocell or certified sustainable viscose, or simply by opting for truly natural fibers like organic cotton and linen, you can avoid the performance headaches and ethical pitfalls of this problematic material. The goal isn't to eliminate all soft fabrics from our lives, but to demand a production process that doesn't sacrifice the health of the planet and its people for a cheap summer dress.