Modal is a soft, regenerated cellulosic fiber made primarily from cellulose derived from wood. It belongs to the rayon family and is especially valued for its smooth hand feel, moisture management, softness and ability to retain comfort through repeated wear and washing.
Modal is often used in clothing that sits close to the skin, including underwear, T-shirts, sleepwear, activewear and lightweight knitwear. It is also found in bedding and other soft home textiles.
The name can sometimes cause confusion because modal is a generic fiber category, while TENCEL™ Modal is a specific branded fiber produced by Lenzing. Modal is also closely related to viscose, but it is engineered to provide particular performance characteristics, including improved wet strength. Textile Exchange classifies modal as a second-generation regenerated cellulosic fiber and a variation of rayon.
Quick Facts About Modal Fabric
| Feature | Details |
|---|---|
| Fabric name | Modal |
| Also known as | High-wet-modulus rayon (HWM rayon) |
| Fiber category | Regenerated cellulosic / man-made cellulosic |
| Primary raw material | Cellulose, commonly from wood |
| Typical feel | Very soft, smooth and lightweight |
| Breathability | Generally high |
| Moisture management | Good |
| Wet strength | Higher than conventional viscose |
| Drape | Soft and fluid |
| Stretch | Depends largely on fabric construction and blends |
| Common uses | Underwear, T-shirts, activewear, sleepwear, bedding |
| Major production regions | Europe and Asia |
| Typical care | Follow the garment care label |
What Is Modal Fabric?
Modal is a regenerated cellulose fiber. Its cellulose usually comes from wood, which is processed into dissolving pulp before being chemically converted into a form that can be spun into textile fibers.
This makes modal different from natural fibers such as cotton and linen. Cotton fibers, for example, can be separated from the cotton plant and spun directly into yarn. Modal requires an industrial regeneration process before the cellulose becomes a usable textile fiber.
Modal was developed as a higher-wet-strength form of rayon. Its performance makes it particularly useful for fabrics that need to remain soft while handling frequent washing and everyday wear.
One of modal’s most recognizable characteristics is its softness. Fine modal fibers can produce fabrics with a smooth surface and comfortable drape, making them popular for garments worn directly against the skin.
What Does Modal Fabric Feel Like?
Modal generally feels soft, smooth and slightly silky. It has a comfortable drape and can be knitted into lightweight fabrics that feel gentle against the body.
Its moisture-management characteristics also make it popular for underwear, activewear and other garments where comfort is important.
The final feel depends on more than the fiber itself. Yarn thickness, knitting or weaving method, fabric weight, finishing treatments and blends can all change how modal feels.
History of Modal Fabric
Modal developed during the evolution of regenerated cellulose fibers in the 20th century.
The fiber was first developed in Japan in the 1950s, where researchers worked on improving the wet strength and practical performance of rayon. Textile Exchange identifies 1951 as an important date in modal’s development.
The development addressed one of the weaknesses of conventional viscose: its relatively poor strength when wet. Modal was engineered to perform better in this respect while retaining the softness and comfort associated with regenerated cellulose.
Lenzing later became one of the most important producers of modal. The company began selling modal fibers in 1964 and introduced an integrated pulp-to-fiber manufacturing approach in 1977.
Today, modal is used internationally in apparel and home textiles, while branded variants such as TENCEL™ Modal occupy the premium end of the market.
How Is Modal Fabric Made?
Modal production is related to viscose production, but the process is modified to produce a fiber with different performance characteristics.
The exact manufacturing process varies between producers, so there is no single factory process that represents every modal fiber.
1. Wood Is Converted Into Cellulose Pulp
The process generally begins with wood or another cellulose-containing feedstock.
The raw material is processed to separate cellulose from other components of the plant. The resulting dissolving pulp is prepared for fiber production.
Responsible sourcing is important at this stage because the environmental profile of a wood-based fiber depends partly on where the wood comes from and how forests are managed.
2. The Cellulose Is Chemically Prepared
The cellulose is treated with an alkaline solution, commonly sodium hydroxide, to prepare it for the subsequent stages of fiber production.
Modal uses a modified version of the rayon process, with conditions designed to produce a fiber capable of retaining greater strength when wet than standard viscose.
3. Xanthation Creates a Spinnable Material
The prepared cellulose undergoes a chemical reaction known as xanthation, involving carbon disulfide.
This converts the cellulose into a form that can be dissolved and prepared as a spinning solution.
This stage is particularly important when evaluating modal’s environmental footprint because carbon disulfide requires careful industrial management.
4. The Solution Is Spun Into Fiber
The resulting solution is passed through a spinneret containing very small openings.
The material emerges as fine filaments, which are then regenerated, stretched and processed to achieve the desired fiber characteristics.
5. Washing and Finishing
The fibers undergo washing and other finishing steps to remove residual processing chemicals and prepare them for textile production.
They can then be cut into staple fibers or otherwise prepared for yarn manufacturing.
6. Yarn and Fabric Production
Once the fiber has been prepared, it is spun into yarn and converted into knitted or woven fabric.
Finishing treatments can further alter properties such as softness, shrinkage, color and surface appearance.
How Is Modal Fabric Used?
Modal is particularly successful in applications where softness, comfort and moisture management matter.
Underwear and Base Layers
Modal is widely used in underwear, undershirts and other close-fitting garments.
Its smooth hand and ability to manage moisture make it suitable for prolonged skin contact.
T-Shirts and Everyday Clothing
Modal is frequently found in T-shirts, tank tops, lightweight tops and casual clothing.
It can be used alone or blended with cotton, elastane and other fibers. Adding elastane, for example, can improve stretch and recovery.
Activewear
Modal can be used in selected activewear because of its softness and moisture-management properties.
It is especially suited to low- and moderate-intensity garments where comfort and hand feel are important. For highly technical performance clothing, specialized synthetic or engineered fibers may offer different advantages.
Sleepwear and Loungewear
The soft surface of modal makes it popular for pajamas, robes, lounge sets and other relaxed garments.
Its drape also works well for loose silhouettes.
Bedding
Modal is used in sheets, pillowcases and other bedding products.
The combination of softness, smoothness and moisture management makes it attractive for textiles that remain in contact with the skin for long periods.
Where Is Modal Fabric Produced?
Modal is produced in several parts of the world, with significant manufacturing activity in Europe and Asia.
Lenzing is one of the best-known producers and manufactures branded modal fibers under the TENCEL™ name. The company has developed integrated production systems in which pulp and fiber manufacturing are closely connected.
China is also an important center for regenerated-cellulose fiber manufacturing, although the exact production landscape changes as manufacturers expand, invest in new technologies or shift capacity.
The country of production alone does not determine whether a modal fiber is environmentally preferable. Production technology, chemical recovery, energy sources, wood sourcing and wastewater management can all make significant differences.
How Much Does Modal Fabric Cost?
Modal generally sits in the mid-range to premium segment of cellulose-based textile fibers, although prices vary substantially.
The cost of modal fabric depends on:
- Fiber quality
- Producer
- Fabric weight
- Yarn construction
- Knitting or weaving method
- Finishing
- Blending
- Certification
- Production location
- Order quantity
Basic modal jersey can be relatively affordable, particularly when manufactured at large scale. Premium modal, branded fibers and fabrics with specialized finishes can command considerably higher prices.
Modal is generally less expensive than silk, while its price can overlap with cotton, viscose and lyocell depending on the quality and market.
A branded fiber should also be distinguished from generic modal. For example, TENCEL™ Modal is Lenzing’s branded modal fiber and has specific sourcing and production specifications.
What Different Types of Modal Fabric Are There?
Modal is itself a specific type of regenerated cellulosic fiber, so it is more useful to discuss different modal specifications and branded technologies rather than treating every variation as a completely separate fiber.
Standard Modal
Standard modal is a regenerated cellulose fiber engineered for softness and improved wet strength.
It is commonly used in everyday clothing, underwear, sleepwear and bedding.
TENCEL™ Modal
TENCEL™ Modal is Lenzing’s branded modal fiber.
Lenzing states that its TENCEL™ Modal fibers use certified or controlled wood sources and are manufactured using a resource-efficient process with high chemical recovery.
TENCEL™ Modal should therefore be understood as a branded modal fiber, not as a different generic fiber category.
Micro Modal
Micro Modal refers to particularly fine modal fibers.
Finer fibers can produce an especially soft and smooth fabric, which is why micro modal is frequently associated with premium underwear, T-shirts and sleepwear.
However, “Micro Modal” can be used in different commercial contexts, so buyers should check the actual fiber specification and brand.
Modal Blends
Modal is often combined with other fibers, including:
- Cotton
- Elastane
- Polyester
- Nylon
- Wool
- Lyocell
Blending can improve stretch, durability, structure, recovery or cost depending on the combination.
How Does Modal Fabric Impact the Environment?
Modal should not automatically be described as an environmentally friendly fabric simply because its cellulose comes from trees.
Its environmental performance depends on forest sourcing, pulp production, chemical management, energy use, water consumption and factory controls.
Wood Sourcing
Because modal is normally produced from wood-derived cellulose, responsible forestry is an important part of its supply chain.
Wood from certified or controlled sources can provide greater assurance about forest management and traceability.
For example, Lenzing states that the wood used for its TENCEL™ Modal fibers comes from certified or controlled sources, including FSC and PEFC systems.
Chemical Processing
Conventional modal production involves chemical processing, including the use of carbon disulfide during xanthation.
Carbon disulfide is a hazardous industrial chemical, so emissions control, worker protection, recovery systems and wastewater management are important factors in responsible production.
This is one reason it is inaccurate to describe all modal as inherently sustainable.
Resource Efficiency
Modern modal production can be more resource-efficient than older regenerated-cellulose processes, but performance varies by manufacturer.
Lenzing reports that its TENCEL™ Modal production uses technology with high chemical recovery and claims at least 50% lower carbon emissions and water consumption compared with generic modal under its stated assessment methodology. These figures apply specifically to the company’s branded fibers and should not be generalized to every modal product.
Lenzing also reports an integrated pulp-to-fiber production system in Austria that uses energy generated within the pulp-production process and has significantly lower production greenhouse-gas emissions than generic modal according to its cited Higg MSI comparison.
What About Biodegradability?
Some modal fibers can biodegrade under appropriate conditions. Lenzing, for example, reports biodegradability and compostability for its standard TENCEL™ Modal fibers based on specific testing and certification.
However, a finished garment containing modal is not automatically biodegradable simply because modal itself can biodegrade. Dyes, finishes, elastane, polyester and other components can change the behavior of the finished textile.
Modal Fabric Certifications Available
Modal itself does not automatically receive a sustainability certification simply because it is a regenerated cellulose fiber.
Certifications and standards apply to different parts of the supply chain.
FSC Certification
The Forest Stewardship Council (FSC) system can help verify responsible forest management and chain of custody for forest-derived materials.
This is relevant to modal because wood is an important source of the cellulose used to produce the fiber.
PEFC Certification
PEFC is another forest certification system used to support responsible sourcing of wood and forest-based materials.
Lenzing identifies FSC and PEFC-certified or controlled wood sources for its TENCEL™ Modal fibers.
EU Ecolabel
Certain textile fibers and products can qualify for the EU Ecolabel when they meet its environmental requirements.
Lenzing states that selected TENCEL™ Modal fibers carry the EU Ecolabel.
OEKO-TEX
OEKO-TEX certifications can address harmful substances in textile products. They should not be confused with forestry certification because they evaluate different aspects of a textile supply chain.
Why Certification Details Matter
When buying modal fabric, it is useful to distinguish between:
- Forest certification — where the wood came from
- Fiber certification — characteristics of the regenerated fiber
- Chemical or process claims — how the fiber was manufactured
- Finished-product certification — properties of the final textile
A label covering one of these areas does not automatically certify all the others.̥
Frequently Asked Questions
Is modal a natural or synthetic fabric?
Modal is neither a conventional natural fiber nor a petroleum-based synthetic fiber. It is a regenerated cellulosic or man-made cellulosic fiber made by chemically processing cellulose, usually obtained from wood.
Is modal the same as viscose?
No. Modal is closely related to viscose and belongs to the same broader rayon family, but it is engineered and processed differently to provide improved wet strength and other performance characteristics. Textile Exchange describes modal as a variation of rayon and a second-generation regenerated cellulosic fiber.
Is modal better than cotton?
Not necessarily. Modal is particularly valued for softness, moisture management and smoothness, while cotton offers its own advantages in durability, familiarity, cost and natural-fiber characteristics. The better choice depends on the intended product.
Is modal breathable?
Yes. Modal fabrics are generally breathable, although the actual breathability depends on fabric weight, knit or weave structure and finishing.
Is modal good for underwear?
Yes. Its softness, smooth surface and moisture-management characteristics make it particularly suitable for underwear and other garments worn directly against the skin.
Is modal good for hot weather?
Modal can be comfortable in warm weather because of its softness and moisture-management properties. Lightweight modal fabrics are generally more suitable for hot conditions than heavy constructions.
Does modal shrink?
Modal can shrink or change shape if it is washed or dried incorrectly. The actual amount depends on the fabric construction and finishing, so the garment’s care label should always be followed.
Is modal durable?
Modal can be quite durable, particularly compared with conventional viscose in wet conditions. Its durability still depends on fiber quality, fabric construction, laundering and how frequently the garment is worn.
Is Micro Modal different from modal?
Micro Modal generally refers to modal made with particularly fine fibers. The finer fiber diameter can produce an exceptionally soft fabric. It is best understood as a finer modal specification rather than an entirely different fiber family.
Is TENCEL™ Modal the same as modal?
TENCEL™ Modal is a branded form of modal produced by Lenzing. Modal is the generic fiber category.
Is modal environmentally friendly?
Modal is not automatically environmentally friendly. Its impact depends on wood sourcing, chemical management, energy use, water consumption and manufacturing controls. Some modern modal production systems have significantly improved resource efficiency, but the specific producer and supply chain matter.
Is modal biodegradable?
Certain modal fibers are biodegradable under specified conditions. However, the biodegradability of a finished garment depends on its complete material composition, including dyes, finishes and synthetic blends.
Can modal be blended with cotton?
Yes. Modal and cotton are frequently blended. The combination can provide cotton’s familiar natural-fiber character with modal’s softness and moisture-management properties.
Is modal better than lyocell?
Neither is universally better. Both are regenerated cellulosic fibers, but their production technologies and performance characteristics differ. Modal is especially known for softness and wet strength, while lyocell is known for its solvent-spinning process and high solvent recovery potential.
Is modal suitable for bedding?
Yes. Modal’s softness and smooth surface make it suitable for sheets, pillowcases and other bedding products. Its moisture-management characteristics can also contribute to sleeping comfort.
