Cotton vs Linen Pajamas: How Each Fabric Wears and Washes

Cotton and linen both come from plants, and they behave differently once they are cloth. Cotton is spun from the soft fibre around the cotton seed. Linen is spun from flax, which grows inside the stalk. Cotton is softer on the first wear and keeps softening. Linen is stronger, drier to the hand, creases readily and dries faster. For pajamas the difference shows up in drape, texture and care.

Where each fibre comes from

Cotton grows as a fibre already. The boll is picked, cleaned, combed and spun, and the individual fibres are short, fine and slightly twisted along their length. That twist is what lets cotton yarn hold a little air, and it is most of the reason cotton feels soft before anything has been done to it.

Flax takes more work. The fibre sits in the woody stalk, so the stalks are retted until the binding material breaks down, then scutched and combed to free the long strands. Those strands are much longer, thicker and straighter than cotton fibres, and they run close to the full height of the plant. Almost every difference between the two fabrics traces back to that one fact.

Structure and weight

Long, stiff flax fibres spin into an uneven yarn, which is why a linen weave carries small thickenings along the threads. Those are slubs, and they belong to the fibre rather than being a fault in the cloth. Linen is nearly always woven, usually in a plain weave with visible texture and an open structure you can see when you hold it to the light. It tends to be offered in mid to heavier weights.

Cotton spins into a smoother, more regular yarn, so it can go in several directions. It can be woven tight and crisp as percale, woven fine and smooth as poplin, or knit into a jersey that gives slightly as you move. That range is why cotton turns up across so much sleepwear. We set out the differences between those constructions in percale, jersey and poplin explained.

Breathability and moisture

Both fibres absorb moisture and both pass it on to the air, which is why each one feels cooler in warm weather than most synthetics do. Linen has the structural advantage. The fibre is hollow, the weave is open, and air moves through it with very little resistance, so linen releases moisture and dries faster than nearly any other everyday fabric.

Cotton takes on a little more moisture before it begins to feel damp, and it takes longer to dry. In a light percale or a fine knit it still moves air well, and the softer surface stays comfortable against skin across a long stretch of wear. If warm months are the question, the best pajamas for summer goes further into weight and construction.

Softness now and softness later

New linen is dry and a little stiff. It has to be worn and washed before it relaxes, and the change is real: linen that has been through thirty washes feels like a different cloth from linen off the bolt. Well worn linen is famously soft, and getting there takes seasons rather than weeks.

Cotton starts soft and improves along a gentler curve. A cotton set feels right on the first night and better a month later, as the mill finish washes out and the fibres bloom. Keeping that going is mostly a matter of warm water instead of hot and leaving the fabric softener out, which is covered in how to wash cotton pajamas so they stay soft.

How each one creases

Linen creases sharply. Flax has very little elastic recovery, so once the cloth folds it holds the fold until it is pressed or dampened. Plenty of people read those creases as part of the fabric and leave them alone. If you would rather the surface stayed smooth, linen asks for a warm iron and a bit of patience.

Cotton creases more softly and less permanently. A cotton pant that has been slept in shows fold lines behind the knee and at the hip, and most of them fall out as you move around during the morning. Folding a set while it is still slightly warm keeps those lines shallow, which is also the point of storing pajamas properly.

Strength and how each one ages

Linen is the stronger fibre by a wide margin, and it is stronger again when wet. That is why linen sheets get handed down. The trade is flexibility. Linen tolerates pulling far better than it tolerates being folded in the same place over and over, so a linen garment usually wears thin along its creases first.

Cotton is more elastic and copes better with repeated bending and frequent washing. Where cotton shows its age is on the surface, in small pills raised by friction at the hip and under the arm. That is a manageable thing rather than the end of a garment, and how to stop cotton clothes from pilling explains what raises them.

Side by side

Choosing between them

Linen suits someone who likes visible texture, wants the fastest drying fabric on the shelf and is relaxed about creases, and who is willing to wear a garment in across a season or two before it reaches its best. It reads casual by nature, and it is fairest to judge it in a warm weight rather than a cold one.

Cotton suits someone who wants the set to feel right on the first night, wants a choice of weights and constructions, and wants something that goes through the wash often without much thought. Every Isla Lune set is 100% cotton with no blends, designed in Victoria, British Columbia, and made in small batches. Sets are sold as separates, so the top and the pant are chosen and sized on their own. Tops are $48 CAD and pants are $68 CAD, sizing runs XXS to XXL, shipping is free across Canada, and returns are open for 30 days on anything unworn and unwashed with its tags. The colourways are Love Letter, a garden floral, along with Raspberry and Moonmilk in stone. They are all in the cotton pajamas collection.

If you are weighing up more than two fibres at once, the best sleepwear material lines seven of them up together, and there are separate write-ups on cotton and polyester, cotton and silk and cotton and bamboo. What you change into also sets the shape of the hours after it, which is where building an evening routine begins.

Common questions

Is linen more breathable than cotton?

Generally yes. Flax fibres are hollow and linen is usually woven with an open structure, so air passes through it easily and moisture leaves quickly. Cotton is breathable too, particularly in a light percale or a fine knit, and it holds a little more moisture before it starts to feel damp. Both move air far better than most synthetic fabrics do.

Does linen wrinkle more than cotton?

Yes. Flax has very little elastic recovery, so a fold pressed into linen stays there until the cloth is ironed or dampened again. Cotton creases as well, but the lines are softer and a good number of them drop out with movement over the course of a morning. If a smooth surface matters to you, cotton asks for less work.

Is linen softer than cotton?

Not at first. New linen is dry and slightly stiff and needs wearing and washing before it relaxes. Cotton is soft from the first night and keeps softening gently after that. Linen changes far more across its life, so a well worn linen piece can end up very soft indeed. It simply takes much longer to arrive there.

Which is stronger, cotton or linen?

Linen. Flax fibre has roughly twice the tensile strength of cotton and it gains strength when wet, which is why linen household textiles stay in use for decades. Cotton is the more elastic of the two and handles repeated bending and frequent laundering better. Linen resists pulling, and cotton resists the wear that comes from creasing and flexing.

Does cotton get softer over time?

Yes. Washing lifts out the finishing agents applied at the mill and lets the fibres relax and bloom, so a cotton set feels better after a month than it did on the first night. Warm water rather than hot, a gentle detergent and no fabric softener keep that going. Softener coats the fibres and slows the process down.