Lyocell is a semi-synthetic fabric made from wood pulp, most commonly eucalyptus, beech, or spruce. It belongs to the regenerated cellulose family, meaning it starts as a natural material (wood) but goes through a chemical process to become a usable textile fiber. The result is a fabric that feels silky and smooth, absorbs moisture well, and breaks down naturally in the environment. You’ve likely encountered it under the brand name Tencel, which is Lenzing’s branded version of lyocell.
How Lyocell Is Made
The production process is what sets lyocell apart from older wood-based fabrics like viscose (rayon). Wood chips are broken down into pulp, then dissolved in a solvent called NMMO. This solvent works by breaking the hydrogen bonds in cellulose and forming new bonds between the cellulose and the solvent molecules, turning solid wood pulp into a thick, honey-like solution. That solution is then pushed through tiny holes (like a showerhead) into a bath that causes the cellulose to re-solidify as fine fibers.
The key environmental advantage is that the NMMO solvent is captured and recycled in a closed-loop system. Top manufacturers recover up to 99.5% of the solvent, meaning very little chemical waste leaves the factory. This is a major improvement over viscose production, which uses carbon disulfide, a toxic chemical that’s harder to contain and poses health risks to factory workers.
How It Feels and Performs
Lyocell has a smooth, cool-to-the-touch surface that’s often compared to silk. Its moisture regain sits around 11%, which means it absorbs water vapor from your skin effectively and releases it, keeping you feeling dry. That’s slightly less absorbent than viscose but significantly better than polyester, which barely absorbs moisture at all.
Where lyocell really stands out among wood-based fabrics is its wet strength. It retains about 85% of its dry strength when wet, making it the only regenerated cellulose fiber with wet tensile strength that actually exceeds cotton’s. This matters practically: the fabric holds up better during washing and doesn’t go limp or fragile when you sweat through it. Its dry tensile strength also surpasses other manufactured cellulose fibers, so garments tend to keep their shape over time.
In a clinical study comparing lyocell to cotton, participants (including those with atopic dermatitis) significantly preferred lyocell for its softness, temperature regulation, moisture control, and wrinkle resistance. Participants wearing lyocell also showed a trend toward less itching and lower moisture loss through the skin, though the difference wasn’t statistically significant. The takeaway: lyocell performs at least as well as cotton against sensitive skin, and most people find it more comfortable.
Environmental Footprint
Lyocell’s environmental story is genuinely strong in some areas and more nuanced in others. The closed-loop solvent system and the use of sustainably harvested wood (certified sources like FSC or PEFC) are real advantages. The fabric also biodegrades quickly. In a study conducted off the coast of La Jolla, California, wood-based cellulose fabrics (including lyocell) fell apart within 30 days in seawater, while polyester fabrics remained mostly intact after more than 200 days. Similar results were replicated in aquarium and bioreactor settings using microbial samples from the North Sea.
The energy picture is less clear-cut. Life cycle analyses comparing lyocell to viscose production in China found that lyocell’s total energy demand was roughly three times higher than viscose’s, though lyocell used less water. There’s no single “green winner” between the two; it depends on which environmental metric you prioritize. Both are significantly less water-intensive than conventional cotton farming, which can require thousands of liters per kilogram of fiber.
Tencel vs. Generic Lyocell
Not all lyocell is created equal. Tencel, made by the Austrian company Lenzing, is the most recognized brand and operates under strict production standards: 99.5% solvent recovery, certified sustainable wood sources, third-party environmental certifications like the EU Ecolabel, and a fully traceable supply chain. Generic lyocell, produced by various manufacturers worldwide, can vary considerably. Solvent recovery rates at generic facilities typically range from 85% to 95%, and there’s no unified regulatory standard governing production quality.
This gap shows up in the finished product too. Tencel fibers tend to have a smoother surface, more consistent feel, lower pilling, more predictable shrinkage, and more even dye uptake. Generic lyocell can be perfectly fine, but you’re more likely to encounter batch inconsistency, coarser texture, or uneven coloring. If a garment label says “lyocell” without specifying Tencel or Lenzing, you’re getting a less standardized product.
Common Uses
Lyocell appears across a wide range of products. In clothing, it’s popular for t-shirts, dresses, underwear, activewear, and denim blends. Its moisture-wicking properties make it a natural fit for bedding, where it competes with cotton and bamboo-derived fabrics. You’ll also find it in towels, medical dressings, and industrial wipes. It blends well with cotton, wool, silk, and synthetic fibers, so many garments contain lyocell as part of a fabric blend rather than 100% on its own.
How to Care for Lyocell
Lyocell is relatively low-maintenance but does best with gentle handling. Wash in cold water, either by hand or on a delicate machine cycle with a mild detergent. Avoid high heat in both washing and drying. Air drying is ideal. After several washes, you can expect about 3% shrinkage, which is modest compared to many natural fibers. The fabric resists wrinkles better than cotton, so you’ll spend less time ironing. If you do iron, use a low heat setting.
One thing to watch for: lyocell can develop a slightly fuzzy surface over time, especially in areas of friction. This is called fibrillation, where the outer layer of the fiber peels into fine microfibers. Some manufacturers treat the fabric to reduce this effect, and it’s less of an issue with higher-quality lyocell like Tencel.