Sweating at night is not inevitable. Very often, it comes down to the fabrics you sleep in. The right bed linen can make a real difference to your sleep quality, thermal comfort and even your skin.

In this guide, we explain which fibres to choose, which ones to avoid, and how to create a truly breathable bed.

Why do we sweat at night?

Night sweating is a natural process. During sleep, the body regulates its temperature and can release between 0.5 and 1 litre of sweat per night under normal conditions. This amount can increase during warm weather or during certain hormonal phases.

The problem is that some synthetic materials, such as polyester and microfibre, trap heat and moisture instead of allowing them to escape. The result: you wake up feeling clammy, uncomfortable and often poorly rested.

The solution starts with the fibres that are in direct contact with your skin.

Which fabrics help you avoid sweating at night?

Organic cotton: a safe choice

Cotton remains an excellent option for breathable bed linen, especially for hot sleepers. Its natural hollow fibres allow air to circulate beautifully and absorb moisture without trapping heat.

However, not all cotton is created equal. GOTS certified organic cotton is grown without pesticides and processed without harsh chemicals. This matters even more for people with sensitive skin or those prone to irritation at night. To better understand why certification matters, read our article on why GOTS is considered one of the best certifications for organic textiles.

At Kalani, our organic cotton percale bed linen iare woven with a 300 TC thread count, giving it the perfect balance of softness and lightness. These are two essential qualities for warm nights.

Organic cotton percale is the ideal fabric for hot sleepers and anyone who tends to feel warm at night. Its tightly woven plain-weave structure encourages breathability while remaining soft to the touch.

Cotton gauze: ultra-light and ideal for summer

Cotton gauze, also known as muslin, is a loosely woven fabric made from two layers of cotton. It is exceptionally light and more breathable.

It is perfect for people who naturally sleep warm, for heatwaves and for bedrooms with little ventilation. Its slightly textured feel becomes softer with every wash.

To compare cotton gauze and washed linen according to your sleep profile, read our article: washed linen or cotton gauze, which should you choose?

Linen: breathable all year round

Linen is a naturally temperature-regulating fibre. It keeps you cool in summer while offering a certain level of warmth in winter. It can absorb up to 20% of its weight in moisture without feeling damp, which is a rare quality.

Linen is also naturally thermoregulating, making it a great choice for people who alternate between feeling too hot and slightly cold during the night.

Washed linen, also known as stonewashed linen, is particularly pleasant to sleep in. It is pre-softened during production and becomes even softer with every wash.

Our washed linen duvet covers and pillowcases are especially appreciated for creating a bedroom that feels both elegant and breathable.

Jersey: best kept for cold nights

This fabric, although natural when made from organic cotton, is too warm for people who tend to sweat at night. It is better suited to very cold winters and sleepers who always feel cold.

Fabrics to avoid if you sweat at night

Certain fabrics are best avoided if you tend to sweat at night. Polyester, for example, traps heat and absorbs very little moisture. For a cooler, more breathable bed, organic cotton percale is a much better choice.

Microfibre is also not ideal: it tends to build up static electricity and does not allow enough air to circulate. A more natural and lightweight alternative is cotton gauze.

Synthetic satin can feel slippery and warm, and it does not absorb moisture well. If you love the smooth, slightly luminous look of satin, choose organic cotton sateen instead, as it is more breathable and much more comfortable against the skin.

Bamboo deserves a special mention. Although it is often marketed as “eco-friendly”, it is most commonly transformed into viscose through an intensive chemical process. If you are looking for a durable and reliable alternative, certified organic cotton remains more transparent and traceable.

Which duvet should you choose if you sweat at night?

A duvet that is too warm encourages heat build-up during the night.

The right duvet to avoid overheating

A duvet that is too thick can quickly make the night uncomfortable, especially if you already tend to sleep warm.

At Kalani, the summer duvet is ideal for people who easily feel hot at night, or for spring and summer evenings, thanks to its light and breathable comfort.

For year-round use, the Kalani natural tempered warm duvet helps maintain a more balanced temperature during sleep. It reduces the feeling of overheating while keeping a soft, enveloping comfort all year round.

The importance of the pillow

We often forget that the pillow also has an impact on thermal comfort during the night.

A breathable pillow allows better air circulation around the head and helps reduce the feeling of heat.

Kalani pillows are designed to offer the right balance between support, softness and breathability, helping to improve night-time comfort even for sleepers who tend to sweat easily.

How to care for breathable bed linen

A few simple habits help preserve the thermoregulating qualities of your textiles:

• Wash at 30 to 40°C maximum for organic cotton and linen.
•  Avoid fabric softeners, as they coat the fibres and reduce absorbency.
• Air dry where possible, or tumble dry on a low temperature.
• Change your sheets every week if you regularly sweat at night.

Sleeping well starts with good habits

Beyond bed linen, a few simple habits can genuinely improve comfort during the night.

• Keep the bedroom temperature at around 18°C.
•  Air the room in the early evening to bring the temperature down before bedtime.
•  Choose natural and breathable fabrics.
•  Change your sheets regularly, ideally once a week, to limit moisture and dust mites.
•  Choose bedding that suits the season.

These simple changes can often reduce the feeling of heat at night and improve sleep quality.

FAQ — What to do if you tend to sweat at night?