What Is Modal Fabric?
Modal fabric is made from modal fibre, a regenerated cellulose fibre produced from wood pulp. It is a modified form of viscose, engineered to be stronger when wet. The technical term is high wet modulus (HWM): the fibre resists stretching and distortion when it is wet far better than standard viscose does. The result is a fibre that keeps the smooth, soft character of viscose with more stability in washing and wear.
Modal is most often made from beech wood, although the exact raw material varies by producer. Because the process dissolves the wood and re-forms it into a fibre, modal is classed as a man-made cellulosic, not a natural fibre. It is also sold under brand names, for instance TENCEL Modal, which is a trademark of Lenzing. When a supplier quotes branded modal, ask for documentation, as you would for any branded fibre.
To see where modal fits in the wider family, read our guides to viscose fabric and TENCEL lyocell.
Modal Fabric vs Cotton vs Viscose vs Lyocell vs Polyester
Choosing modal usually means choosing it against something else, so a side-by-side view helps. The table compares modal fabric with the fibres buyers most often consider alongside it. As always, yarn quality, fabric construction and finishing can move any single row, so use this as a briefing aid, not a specification.
Modal compared with common alternatives
| Property | Modal | Cotton | Viscose | Lyocell | Polyester |
|---|---|---|---|---|---|
| Handfeel | Silky, smooth, very soft | Soft, dry; softens with washing | Smooth and cool | Smooth and cool; may be silky or peachy | Varies from slick to brushed |
| Drape | Fluid | Moderate | Very fluid | Fluid | Varies |
| Wet strength | Better than viscose | Good | Low | Good | Very good |
| Shrinkage risk | Lower than viscose; still needs testing | Moderate | Higher | Moderate | Very low |
| Absorbency | High | High | High | High | Very low |
| Colour depth | Deep, rich | Good | Deep, rich | Good | Durable; needs disperse dyes |
| Cost level | Higher than cotton | Low to medium | Low to medium | Medium to higher | Low |
General characteristics only. Individual fabrics vary with fibre grade, yarn, knit and finish.
Compared with cotton, modal is smoother, more fluid and less likely to feel dry or crisp. Compared with viscose, it holds its shape better after washing. For the wider picture on polyester, see our cotton vs polyester guide.
Indicative Modal Fabric Ratings
The matrix below translates the comparison into a five-point scale for the three fibres most often swapped for one another. It assumes ordinary jersey of similar weight and quality for each.
Modal against cotton and viscose
1 dot = low, 5 dots = high
| Modal | Cotton | Viscose | |
|---|---|---|---|
| Softness and silkiness | ●●●●● | ●●●●● | ●●●●● |
| Drape | ●●●●● | ●●●●● | ●●●●● |
| Wet strength | ●●●●● | ●●●●● | ●●●●● |
| Shape retention | ●●●●● | ●●●●● | ●●●●● |
| Pilling resistance (good quality) | ●●●●● | ●●●●● | ●●●●● |
| Ease of care | ●●●●● | ●●●●● | ●●●●● |
| Low cost | ●●●●● | ●●●●● | ●●●●● |
Indicative ratings based on typical fabric/process characteristics, not laboratory results.
Modal gives up some cost advantage and some of cotton's easy-care reliability in return for softness and drape. That trade is worthwhile for premium basics, loungewear and underwear, and rarely for hard-wearing workwear.
What Is Micro Modal?
Micro modal is the name used for modal made from especially fine fibres. Finer fibres create a smoother, lighter fabric with an even softer feel and a more pronounced silky surface. It is used where next-to-skin comfort is the priority, including lightweight tees, underwear, loungewear and layering pieces.
The finer the fibre, the more delicate the fabric can be. A light micro modal jersey may be more prone to snagging or showing fabric flaws than a heavier modal-cotton blend, so it needs careful handling in cutting and sewing. Always ask the mill for the fibre type and the fabric weight, and request a swatch to check the surface after a wash.
Typical modal jersey weights by use
Grams per square metre
Typical, approximate bands. Actual weights vary by product, mill and blend; always confirm GSM on the specification.
Modal Cotton Blend and Modal Elastane Blends
Pure modal is rarely used for everyday garments. Most modal fabric is blended, because blending lets you tune the handfeel, cost and performance. Blends also help to manage the weaknesses of a single fibre.
Common modal blends and what they are for
| Blend | Character | Typical use |
|---|---|---|
| Modal-cotton | Softer and smoother than cotton, more stable than pure modal | Premium tees, loungewear, relaxed knits |
| Modal-elastane | Soft with stretch and recovery | Fitted tops, leggings, underwear, bodysuits |
| Modal-polyester | Soft with better durability and quick drying | Easy-care tops and loungewear |
| Modal-lyocell | Fluid and smooth, with extra wet strength | Soft shirts, dresses, drapey knits |
Check the declared proportions: the majority fibre sets the character of the cloth.
Modal-cotton jersey is the blend closest to the cotton jersey that Ruhrose already works with, and a good place to start if you want a softer product without moving to a specialist supply chain. Our jersey buying guide explains what to check before bulk.
Where Modal Fabric Is Used in Garments
Modal fabric is almost always a knitted fabric, and the garments where it shines are the ones worn close to the body. Its smooth surface reduces irritation, and its absorbency helps it feel comfortable in warm conditions. It is less common in rugged outerwear or hard-wearing casualwear, where abrasion resistance matters more than softness.
- T-shirts and premium basics, usually as modal-cotton jersey.
- Loungewear sets, joggers and relaxed sweat tops in lighter knits.
- Underwear, vests and sleepwear, where softness and stretch are key.
- Layering pieces and long-sleeve tops in finer gauges.
- Soft drapey dresses and tops, often blended with elastane.
If you are weighing modal against standard cotton for a t-shirt, specify weight carefully as well as fibre. Our fabric GSM guide shows how weight changes the feel and opacity of a tee.
Pilling, Shrinkage and Colour: Controlling Modal Fabric Quality
Modal is well regarded for its resistance to pilling and its colour depth, but the quality of a given modal fabric depends heavily on the yarn, the knit and the finishing. Poor yarn or poor finishing can produce fuzzing, pilling and surface marks within a few washes.
- Pilling: ask for the pilling test method and grade, and check swatches after repeated washing.
- Shrinkage: modal usually relaxes less than viscose, but jersey still shrinks, and mostly along the length. Set a target and test the bulk fabric.
- Colour fastness: deep shades need testing to rubbing, washing and perspiration; dark colours can crock.
- Snagging: very fine micro modal jersey can snag on rough surfaces and jewellery.
Our garment testing guide lists the tests to request and how to read the results. Build the wash-test result into your pattern allowances, because it affects final measurements.
Modal vs Cotton: How to Decide
The decision between modal and cotton comes down to what the customer notices first. If the product is sold on how it feels against the skin, modal is worth testing. If it is sold on toughness, price or an easy-care reputation, cotton or a cotton-rich blend is usually the safer base. Modal fabric also suits garments worn flat against the body more than garments that are heavily layered.
Choosing between modal and cotton
| If your priority is | Lean towards | Why |
|---|---|---|
| Premium softness and drape | Modal or modal-cotton | Smoother surface and more fluid hang |
| Low price and simple care | Cotton or cotton-rich blend | Lower cost and well-understood washing behaviour |
| Heavy wear and repeated washing | Cotton or polyester blend | Better robustness over time |
| Rich colour and a silky finish | Modal | Takes deep colour and has a smooth surface |
| Stretch and recovery | Modal-elastane or cotton-elastane | Elastane supplies recovery whichever base fibre you choose |
A starting point for a conversation, not a rule. Always confirm with swatches and a wash test.
A practical approach for a small brand is to start with a modal-cotton blend, wear-test it, and move to higher modal content only if your customers value it enough to pay for it.
Caring for Modal Fabric
Modal fabric is easier to care for than viscose, but it is still best treated gently to keep its softness and shape. A cool to warm machine wash with a mild detergent is common, followed by low-heat drying or line drying. Avoid hot washing, harsh bleaches and high-heat tumble drying, which can roughen the surface and accelerate shrinkage.
The label should always reflect testing of the finished garment, since trims, prints and linings can change the safe method. If you are not sure, run a test wash on a sample and measure again, then write the care label from the evidence.
Sustainability: Reasonable Questions About Modal
Modal is often presented as an eco-friendly fibre because it comes from wood. As with viscose, the honest position is that sustainability depends on how the wood is sourced and how the fibre is produced. Responsible forestry and well-managed, closed-loop chemical systems can reduce impact, but they are not guaranteed by the word modal.
Practical questions to ask a supplier include whether the pulp comes from certified forests, which fibre producer made the modal, and whether it is a branded fibre with traceability. Ask for documentation of standards you plan to mention, such as FSC or PEFC pulp certification and OEKO-TEX Standard 100 for product testing. For wider context, see our guide to sustainable fabrics.
How to Specify and Test Modal Fabric
A good specification keeps a mill from substituting a cheaper fibre or construction. Use the sequence below and attach the details to your tech pack and purchase order.
Specifying modal fabric
- 1State the fibreWrite the exact blend, for example modal and cotton, and whether it is micro modal or branded modal.
- 2Set weight and structureGive the GSM, knit structure and yarn count if known.
- 3Define performanceSet targets for shrinkage, pilling and colour fastness.
- 4Request a swatchHandle it, wash it several times and compare it with a reference.
- 5Approve a sampleCheck measurements after washing, then approve bulk.
Questions to ask the mill
- Is the fibre generic modal or a branded modal, and can you document it?
- What are the average shrinkage figures in length and width?
- What pilling grade does this fabric achieve, using which test method?
- What is the weight tolerance in GSM?
- Which certifications can you document for pulp, fibre and fabric?
How Ruhrose Approaches Modal Fabric
Ruhrose develops hoodies, jersey, denim and woven casualwear for UK buyers, with production in Bangladesh. Modal blends, particularly modal-cotton and modal-elastane jersey for tees and loungewear, are a reasonable thing to discuss at the sampling stage, and we will tell you plainly whether a fabric is available and suitable. Specialist intimates and technical underwear sit outside our core range, so if that is your focus, a dedicated underwear manufacturer will be a better match.