Modal & Micromodal: The Softest Sleepwear Fabric, Explained

Micromodal is one of those words you see on a hangtag and nod at without really knowing what it means. It sounds technical. It sounds expensive. It is neither, exactly. Here is the actual answer, with no hand-waving, so the next time someone asks what their softest pajamas are made of, you can tell them.

What is micromodal, actually?

Micromodal is a regenerated cellulose fiber made from beech tree wood pulp. That phrase is doing a lot of work, so let's unpack it. Cellulose is the structural material in plants. "Regenerated" means the wood pulp gets broken down and reformed into long, spinnable filaments. So the raw material starts as a tree and ends as a soft, fine yarn. It is plant-based at its origin, processed into something that behaves nothing like the bark it came from.

The "micro" part is the whole point, and we will get to why in a second. For now: micromodal is the finer, smoother cousin of standard modal, and it has quietly become a favorite in premium sleepwear. Heritage micromodal houses like Derek Rose build from beech pulp, and brands like SKIMS Sleep make their sleepwear from micromodal too. It has earned its spot in the better drawers.

How is micromodal made?

It begins with beech trees. The wood is processed into pulp, the cellulose is extracted, and that cellulose is spun into fiber. Because the source is wood and the process reshapes natural cellulose rather than building plastic from petroleum, modal sits in the family of plant-derived fibers rather than fully synthetic ones.

What makes the fiber good is what happens during spinning. The filaments are drawn out long and even, which is part of why the finished fabric holds its shape and keeps its color instead of going slack and dull after a few washes. That durability is not an accident. It is built into how the fiber is made.

How is micromodal different from regular modal?

Standard modal is already soft. Micromodal takes it further by spinning the fiber with micro filaments that are finer than standard modal, by roughly 50%. Think of it as the difference between a fine yarn and an even finer one.

That thinner filament changes everything you actually feel:

• Smoother hand. Finer filaments mean a smoother surface, so the fabric reads silkier against skin.
• Softer overall. Less coarseness, more give. This is the quality people notice first.
• More durable. The finer, well-formed fiber holds up, which is why a good micromodal piece keeps its shape and color over time.
• Silk-like drape. Instead of sitting stiff, the fabric falls. It moves with you instead of fighting you.

So when you see "micromodal" instead of "modal," you are not reading marketing fluff. It is a genuinely finer fiber, and the difference is in your hands the moment you touch it.

Why does micromodal suit sleepwear so well?

Sleepwear has a short list of demands. It has to feel good for hours. It has to handle a warm body in a warm bed. It has to survive constant washing without turning into a sad, pilled version of itself. Micromodal answers all three.

It is widely recognized as breathable and naturally moisture-wicking, which matters more than people admit. You are not a still object when you sleep. You shift, you warm up, you cool down. A fiber that lets air move and pulls moisture away keeps you comfortable through that whole cycle. It is also recognized for being soft and good at holding its shape and color, so the piece that felt wonderful on night one still feels wonderful months in.

Put plainly: the qualities that make micromodal special are exactly the qualities you want against your skin while you sleep. That overlap is why it keeps showing up in the better drawers, and why we built around it.

How does gosiahaynes use micromodal?

We use a blend of 94% Micromodal and 6% Lycra, knit into a light rib texture from superfine yarns. The fabric is imported from Europe, where the mill knows what it is doing. That small percentage of Lycra is what gives the fabric its stretch, so a piece hugs just enough without clinging or constricting. You get the silk-like softness of the fiber plus a little give that moves when you move.

The light rib is a quiet detail that does real work. It adds a subtle texture and a bit of structure to fabric that would otherwise be entirely soft, which keeps the pieces looking considered rather than shapeless. This is what designed with intention looks like in practice: the fiber, the blend, the knit, and the mill all chosen on purpose.

You will find it across the line. The Tank Sleep Dress and Dolman Sleep Dress, the Sleep Tank Top and Sleep Cami Top, the Tap Short, and the Long Robe. They come in Bluebell, Pink Poppy, and Black Iris. Caring for them is simple, and worth doing right to keep the fabric living up to its reputation: gentle wash cold, hang to dry or tumble on low, and skip the bleach and high heat. The fiber rewards a little restraint.

The short version

Micromodal is a soft, breathable fiber spun from beech tree wood pulp, finer than standard modal by about half, with a silk-like drape and a real talent for holding its shape and color. That combination is why it belongs in sleepwear, and why we knit ours from a 94/6 Micromodal and Lycra blend at a European mill, with a light rib that gives each piece a little structure and a lot of softness.

Now you know what the hangtag means. Fabulous. always.