For sheets, five fabrics are worth buying: cotton percale, cotton sateen, bamboo viscose, linen and modal. The right choice depends on how you sleep: someone who wakes up overheated needs a fibre that moves moisture away, and someone who feels cold needs a denser weave. The rest is weaving. Before the price, look at the composition: the fibre decides comfort, while the thread count only decides the handle.
We chose a single fibre and work it at 300 thread count: the Looniva bamboo viscose bedding is OEKO-TEX Standard 100 class 1, the class for products for children up to three years old.
Sheet fabrics compared
On product pages about a dozen names circulate and half of them are not fibres: they are weaves, meaning the way the threads cross. The fibres that matter in bedding are five, plus polyester sold as microfibre and brushed cotton sold as flannel. The table lines up hand feel, behaviour with heat and how much care each one needs.
| Fabric | How it feels | With heat | Care | Suited to |
|---|---|---|---|---|
| Cotton percale | dry, slightly crisp | stays cool to the touch | can be ironed, tolerates hot washes | those who want the feel of a hotel bed |
| Cotton sateen | smooth, with a sheen | keeps cool less than percale | sensitive to friction and harsh washing | those who want softness and drape |
| Bamboo viscose | fluid, cool on first contact | moves moisture away quickly | wash at 30 degrees, no fabric softener | those who wake up overheated |
| Linen | rough at first, softens with washing | very breathable, dries quickly | no ironing, the crease is part of the item | those who accept a lived-in bed |
| Modal | smooth and light | good, on moisture less than bamboo | gentle wash, sensitive to high heat | those who want softness at a mid price |
| Polyester microfibre | smooth, slightly rubbery | traps heat and moisture | durable and inexpensive | those who only look at price |
| Cotton flannel | fluffy, warm straight away | traps heat by construction | sheds lint after many washes | cold bedrooms in the winter months |
The first five rows are fibres, the sixth is a very dense polyester weave and the seventh is cotton brushed on the surface. This is why two sheets both labelled "cotton" can feel quite different: what changes is the weave, and that changes everything.
In summary
- Five fibres cover almost all the bedding on sale: cotton, bamboo viscose, linen, modal and polyester
- Bamboo viscose takes up 13% of its own weight in moisture, against 0.4% for recycled polyester (Journal of Natural Fibers, 2025): this is the figure that separates a fibre that dries from one that holds moisture
- On the label, bamboo must be written as viscose: the name "bamboo" alone is not permitted (EU Regulation 1007/2011)
- OEKO-TEX Standard 100 class 1 is the strictest of the four classes, the one for products for children up to three years old (source: oeko-tex.com)
- Thread count should only be compared within the same weave and the same type of yarn, never between different fabrics
Fibre and weave, two different decisions
The fibre is the material: cotton, linen, bamboo viscose, modal, polyester. The weave is the pattern in which the threads cross, and on the same fibre it produces items that seem to come from two different worlds.
In percale every weft thread passes over and under one warp thread, one at a time. The result is a matt, dry surface with the light crispness of hotel sheets. In sateen, the same amount of cotton is arranged with three or four weft threads crossing over a single warp thread: light runs across the surface, the fabric becomes smooth and drapes more softly, and in exchange it snags more easily and holds a little more heat.
This is where the thread count confusion comes from. A 300 thread count sateen and a 300 thread count percale contain the same amount of yarn and give two opposite sensations: the number alone does not rank quality, as explained in the guide on what the thread count per centimetre really tells you. Above a certain level, manufacturers also count twisted threads, and the four-digit numbers on packaging come from there.
If you wake up overheated
Someone who wakes up with a damp T-shirt has a moisture problem that stays between skin and fabric, and the room temperature matters less than it seems. The criterion to look at is how much water the fibre can take in and release into the air: the feeling of coolness on first contact lasts a few minutes and says nothing about the rest of the night.
On this, cellulose fibres win by construction. Bamboo viscose takes up 13% of its own weight in moisture, recycled polyester 0.4% (Journal of Natural Fibers, 2025): with the same amount of sweat, one moves it away and the other keeps it against the body. Linen works in a similar way and also dries quickly; lightweight cotton percale is the cautious choice if you want to stay with the classics.
Among regenerated fibres, the useful comparison is with modal, which is very soft but a step behind on moisture: we measured it in the comparison between bamboo and modal. For the hot season, with verdicts by sleeper profile, there is the guide to the coolest fabrics for sleeping.
Polyester is the only clear exclusion in this guide: it costs little, lasts a long time and sends back to you the heat the body is trying to lose. If the bed wakes you at three in the morning, it is the first material to remove.
If you feel cold at night
Cold is solved with layering and weight, not by changing fibre mid-season. Cotton flannel has a brushed surface that traps a thin layer of air and warms up in seconds: it is perfect for a bedroom at 15 degrees and becomes unbearable in April. Heavy percale and cotton sateen are the less extreme alternatives, which can be used all year round.
Bamboo viscose, which works well in summer, in winter works with a warmer duvet on top: the fibre follows body temperature rather than producing it. For what to put on top of the sheet, the comparison between duvet cover and quilt lays out the two solutions season by season.
If your skin gets irritated easily
With reactive skin, three things matter, and none of them is the fibre name on the packaging. The first is the surface: a smooth, even fibre rubs less than a short, irregular one. The second is chemical finishing: wrinkle-resistant finishes, poor-quality dyes and accumulated fabric softener are responsible for many irritations attributed to the fabric. The third is certification of the finished product, the only way to know what is really in the item.
OEKO-TEX Standard 100 tests for over a thousand harmful substances in the finished product and has four classes. Class 1 is the strictest, the one for products for children up to three years old (source: oeko-tex.com), and for bedding the class required is 2, the one for direct skin contact: a class 1 item goes beyond the minimum. The subject of textile comfort for sensitive skin is covered in the guide to sheets for sensitive skin. For skin conditions, the assessment remains with the dermatologist.
How long a fabric lasts, and what it depends on
How long a sheet lasts depends on the length of the fibres in the yarn, on the twist and on the washes. Long fibres stick out less from the thread, so they break less and form fewer pills: this is why long-staple cotton costs more than short cotton with the same thread count, and the difference shows by the twentieth wash. The same logic applies to the comparison between bamboo and high-end cottons, which we tested head to head in bamboo and Egyptian cotton.
Then there are the washes, which do more damage than any manufacturing defect. High temperatures, violent spinning and fabric softener shorten the life of all cellulose fibres: the washing rules are the same for bamboo, modal and linen, and are set out in the guide on how to wash bamboo without ruining it. Linen is the exception that improves with age, which is why it is sold as an item to be handed down.
What a long-lasting fabric costs
Below a certain price, the sums stop adding up. A traceable fibre, compliant dyeing and certification of the finished product have costs that cannot be squeezed, and when the price of a full set falls below that of two T-shirts, the simplest explanation is that one of the three pieces is missing. The hidden polyester percentages in a blend exist precisely for this reason, and to spot them you start from the label: how to read it is explained in the guide on how to recognise real bamboo viscose.
The right calculation is per night. A set that lasts four years and is washed once a week costs a fraction of a cent per night of sleep, and the difference between the right fabric and the wrong one is paid every single night, not once at the till. Our complete bamboo sets are built on this reasoning: one fibre, 300 thread count, and the freedom to return them within 30 days if the bed does not convince you.
The most common mistakes when choosing
- Buying by looking only at the thread count: it matters within the same weave, not between a sateen and a percale, and above 400 the numbers become promotional.
- Stopping at the word bamboo on the label: the fibre is called viscose, and an item that only says "bamboo" does not comply with EU Regulation 1007/2011.
- Choosing sateen for the hot season: it is smooth and pleasant, and precisely because of its construction it holds more heat than percale.
- Buying microfibre for the bed: it has an unbeatable price and holds moisture on the skin, which is the worst fault in a bedroom.
- Ignoring care before buying: linen that cannot be ironed and sateen that must be washed carefully require different habits, and the wrong fibre ends up at the bottom of the wardrobe.
Frequently asked questions
What is the best fabric for sheets?
The best fabric depends on the profile of the sleeper. Those who wake up overheated do better with bamboo viscose or linen, which move moisture away. Those who want the dry feel of a hotel bed choose cotton percale. Those who want softness choose sateen or modal. Those who feel cold take flannel for the winter months and switch in spring.
What is the coolest fabric for sheets?
Cellulose fibres, meaning bamboo viscose, modal and linen, along with cotton in a percale weave. The criterion to look at is the ability to take up moisture and pass it to the air, because the coolness felt when you touch the fabric lasts only a few minutes. The full comparison of the five coolest fabrics, with verdicts by sleeper type, is in the guide dedicated to fabrics for the hot season.
What is the difference between percale and sateen?
It is a difference of weave, not of material: both can be pure cotton. In percale the threads cross one at a time and the surface stays matt and dry. In sateen three or four weft threads pass over a warp thread, so the surface becomes glossy and smooth, drapes more softly and holds a little more heat.
Do microfibre sheets make you sweat?
Microfibre is polyester, and polyester takes up 0.4% of its own weight in moisture against 13% for bamboo viscose (Journal of Natural Fibers, 2025). The water the body releases during the night therefore stays between skin and fabric instead of passing into the air, and the sensation that follows is that of a damp, hot bed.
How many threads should a good sheet have?
Between 200 and 400 threads per square centimetre covers almost all quality bedding. Below 200 the fabric is thin and wears out quickly; above 400 the number grows by counting twisted threads more than the real yarn. Within that range the number describes the handle of the fabric, and quality is decided by the fibre and the finish.
Edoardo Guarise