Pick up a t-shirt that feels almost liquid against your skin, check the tag, and there is a good chance it says “modal.” Over the last decade it has moved from a niche ingredient in expensive underwear to a fabric you will find in everything from loungewear to premium basics, and it is one of the most searched fabric names online. For a clothing brand owner that popularity creates a practical question: is modal genuinely better than the cotton you were planning to use, or is it just a nicer word on a hang tag?
The honest answer is that modal is excellent at a few specific jobs and unnecessary for others. This guide explains what it actually is, how it behaves in real garments, where it earns its higher price, and what you need to know before you ask a factory to make it for you.
What Modal Fabric Actually Is
Modal is a semi-synthetic cellulosic fibre. The raw material is wood pulp, most often from beech trees. That pulp is dissolved with chemicals, pushed through very fine nozzles to form continuous filaments, and then set into solid fibre that can be spun into yarn and knitted or woven into fabric. Because the starting point is a natural plant material but the fibre only exists thanks to industrial processing, it does not fit neatly into “natural” or “synthetic.” Textile people call it regenerated cellulose.
Modal belongs to the same family as rayon and viscose, but it is a refined member of that family. Early viscose had a well-known weakness: it lost a lot of strength when wet, so it stretched, distorted and wore out quickly in the wash. Modal was developed in Japan in the 1950s as a “high wet modulus” rayon, which in plain terms means it keeps much more of its strength and shape when it is soaked. That one improvement is why modal can be used in garments that are washed often and worn against the body all day, such as underwear and t-shirts, where ordinary viscose would struggle.
You will see two kinds of modal in the supply chain. Lenzing Modal is the best-known branded version, produced by the Austrian fibre company Lenzing, which also sells lyocell under the Tencel name. There is also generic modal from other producers. Both are modal, but quality and consistency vary between mills, which is one reason a sample matters so much (more on that below).
How Modal Feels and Behaves
The first thing people notice is softness. Modal fibres are fine and smooth, and fabric made from them has a silky, slightly cool hand-feel that regular cotton jersey does not quite match. The second thing is drape. Where cotton tends to hold its own shape and sit away from the body, modal hangs and flows. A modal-rich tee looks more fluid on a person, which is why it photographs well and why it is popular in fitted, body-skimming pieces.
Moisture handling is another strength. Modal absorbs water readily, and the fibre producer reports that it takes up more moisture than cotton. In real wear this means a modal garment feels comfortable in warm conditions and does not feel clammy as quickly. It also takes dye very well. Colours come out deep and saturated, and they tend to hold up through repeated washing better than many cotton fabrics, which can look faded and tired after a few months.
Shrinkage is where people get confused. Modal is more dimensionally stable than standard viscose, and in many constructions it shrinks less than untreated cotton. But “shrinks less” is not “does not shrink.” If a modal garment is washed in hot water and tumble dried on high heat, it can still lose size. The fibre also has lower wet strength than cotton in some constructions, so aggressive laundering gradually wears it down. Good care labelling is part of the product.
The weaknesses are worth stating plainly. Modal can pill, particularly when the yarn is low quality or the fabric is rubbed repeatedly, such as at the inner thigh or under a bag strap. It is generally not the right choice for rugged garments or anything that needs to survive industrial washing. And it costs more than basic cotton or polyester, sometimes a lot more depending on the blend and the mill.
Modal vs Cotton: Which Should You Use?
Most brand owners reach modal because they are comparing it with cotton, so it helps to think about what each fibre is best at rather than which one is better.
Cotton is the reliable workhorse. It is durable, familiar, cheaper, easy to source in many weights and colours, and it takes printing extremely well. If your product is a graphic tee, a promotional shirt or workwear that will be heavily washed, cotton or a cotton blend is usually the smarter commercial choice. Screen printing in particular sits beautifully on cotton jersey, and customers are used to how it feels.
Modal is the comfort and finish fabric. It makes sense when the garment is worn against the skin for long stretches, when drape and softness are the selling point, or when your brand is positioned at a mid to premium price where customers will notice the difference. Think underwear, sleepwear, loungewear, fitted long sleeves, and the kind of plain, high-quality tee that people buy because it feels good rather than because it carries a graphic.
In practice many of the best-selling garments use both. A cotton-modal blend keeps some of cotton’s structure and print-friendliness while borrowing modal’s softness and drape. If you want to think through the wider decision, our guide to choosing the best fabric for your clothing brand walks through how fibre choice affects price and positioning, and our comparison of cotton vs polyester covers the two fibres modal is most often blended with or measured against.
Common Modal Blends and What They Are For
Pure modal fabric exists, but most commercial garments use blends because blending lets you balance feel, strength, stretch and cost.
Modal and cotton is the classic premium-tee blend. Modal with a few percent of spandex gives stretch and recovery, which is what you want in underwear, leggings and fitted tops that need to move with the body and spring back. Modal with polyester adds durability and wrinkle resistance and lowers the price a little. Modal is also sometimes mixed with other cellulosic fibres such as lyocell to fine-tune the texture.
Because “modal” on a label says very little on its own, always ask for the exact blend percentages in writing. A tee that is 95 percent modal behaves very differently from one that is 40 percent modal with a polyester base, and your customers will feel the difference even if they cannot name it.
Where Modal Works Best in a Collection
The categories where modal pays for itself are the ones where softness and drape are visible to the customer. Underwear and bralettes are the obvious example, along with sleepwear and loungewear sets. Premium t-shirts and long sleeves are another strong use. You will also find modal in yoga pants and soft stretch bottoms, in everyday socks where it adds comfort next to the foot, and in flowing dresses and tops.
It is much less common in heavy outerwear, rugged workwear or garments that will carry thick, heavy prints. If your first collection is built around bold graphics on hoodies and tees, you will almost always do better starting with cotton and adding a modal blend in a later “premium basics” drop.
Is Modal Sustainable?
Modal gets marketed as a sustainable fabric, and sometimes it is, but the claim deserves care. The wood pulp can come from certified, responsibly managed forests, and good producers recover and reuse the chemicals used in processing through closed-loop systems. Lower-grade producers may not, and the environmental profile of the finished fabric also depends on dyeing, finishing and energy use at the mill.
If sustainability is part of your brand story, ask your manufacturer for documentation about the fibre source and any relevant certifications for the wood (such as FSC or PEFC) or the finished fabric (such as OEKO-TEX) before you put anything in your marketing. Vague claims like “eco-friendly” without evidence create more risk than they are worth.
How to Care for Modal Garments
Care instructions matter more with modal than with cotton, because the way it is washed decides how long it lasts. Cool or warm water on a gentle cycle, no bleach, and low heat or line drying will keep it soft and stable. Hot washes and high-heat dryers are what cause shrinkage and the rough, tired look that makes customers think the fabric was poor quality. Put clear instructions on your care label and repeat them on your product page.
Making Modal Garments: What Actually Happens at the Factory
Modal knits are soft and fluid, which makes them slightly harder to handle than stable cotton jersey. The fabric can stretch while being cut and sewn, so experienced operators and well-set machines matter. Seams need appropriate stitch types so they stretch with the fabric, and pre-washing or compacting the fabric before cutting reduces surprises after the first wash. Our washing and fabric processing services exist for exactly this reason.
Fabric supply is the part new brands tend to underestimate. There are two realistic routes. The first is to use ready-made market fabric: your manufacturer finds the closest available modal or modal-blend knit in your colour and weight from what mills already have. That works for smaller orders, but the exact match depends on what is available at the time. The second is custom-knitted fabric, where the blend ratio and construction are made to your own specification. That requires much higher volumes because mills and knitters have their own minimums.
At The Sigma Apparel our minimum order is 100 pieces per style. For quantities below the level where custom fabric is viable, we source the closest available match in colour and specification from ready-made market fabric, subject to availability at the time of order. Custom-blended fabric knitted to your specification starts at 1,000 pieces and comes with a lab test report confirming the exact composition. We would rather explain that clearly at the start than let a brand plan a launch around a fabric the supply chain cannot deliver at their volume.
Practical Tips Before You Order
Always request a swatch or a full sample before approving bulk production, because hand-feel is subjective and modal quality varies between mills. Wash the sample several times and check shrinkage, shape retention and pilling, since those problems appear after laundering, not on the cutting table. Confirm the blend percentages and fabric weight in writing, and record them in your tech pack along with shrinkage tolerance and finishing. The weight itself matters: a 160 GSM modal tee drapes very differently from a 220 GSM one, and our GSM guide explains how to choose.
If you plan to decorate modal, test first. Screen printing works but behaves differently from cotton because of the fabric’s drape and absorbency, and fine embroidery needs the right backing so soft knit does not pucker around the stitching.
Frequently Asked Questions
Is modal natural or synthetic?
It is neither entirely. Modal is semi-synthetic: the raw material is natural wood pulp, usually beech, but it is chemically processed to create the fibre. It sits in the regenerated cellulose family alongside rayon, viscose and lyocell, rather than with natural fibres like cotton or fully synthetic ones like polyester.
Is modal better than cotton?
Not across the board. Modal is softer and drapes better, and it holds colour well. Cotton is generally more durable, cheaper and easier to print on. Many brands choose a modal-cotton blend to get a bit of both, and use plain cotton for printed and rugged products.
Does modal shrink?
Modal shrinks less than standard viscose and in many cases less than untreated cotton, but it can still shrink if washed and dried at high temperatures. Pre-shrunk or compacted fabric, cool washing and low-heat drying keep shrinkage under control.
Does modal pill?
It can, especially when the yarn is low quality or the fabric is rubbed often. Good-quality modal and gentle laundering reduce pilling a great deal, which is another reason to wash-test samples before you commit to bulk.
Is modal the same as rayon or viscose?
Modal is a type of rayon, made with a modified process that gives it more strength, particularly when wet. Standard viscose is the cheaper, weaker relative. If you want to compare them in detail, our guides to rayon and viscose cover the differences.
Is modal good for underwear and activewear?
Modal is very popular for underwear and loungewear because it is soft and breathable. For high-sweat sportswear it is usually blended with synthetic fibres for durability and faster drying, and a little spandex adds the stretch needed for fit.
Is modal eco-friendly?
It can be more sustainable than some conventional fibres when sourced from certified forests and made in closed-loop facilities, but it is not automatically eco-friendly. Ask for documentation before making environmental claims.
Can I print on modal fabric?
Yes, modal can be screen printed and heat transferred, but it is less forgiving than cotton and a test print is wise. Dark colours, thick inks and very fine detail all behave differently on soft, drapey knits.
Ready to Make Modal Garments for Your Brand?
If you are planning a premium loungewear, tee or underwear line, contact The Sigma Apparel with your target fabric, weight and quantity. We will tell you honestly what is achievable at your volume and what a sample would involve, and our private label clothing manufacturing team can take the project from first sample to bulk production. You will find more fabric guidance on our blog.
