
Sleeping in hot weather can be uncomfortable and even dangerous, with the US National Institutes of Health warning that too much heat can harm your brain and other organs. While air conditioning is an option, it can be expensive to run. Fortunately, there are many ways to keep cool at night without using power, from choosing the right mattress and bedding to making simple changes to your sleep environment.
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What You'll Learn
- Use breathable sheets and pyjamas made from cotton, linen, or bamboo
- Choose a mattress with good airflow and cooling technology
- Install blackout curtains to reflect heat and keep your room cool
- Position fans near open windows to push hot air out of the room
- Take a cold shower or bath to lower your core body temperature

Use breathable sheets and pyjamas made from cotton, linen, or bamboo
If you're struggling to sleep in the heat, breathable sheets and pyjamas made from cotton, linen, or bamboo can make a big difference. These fabrics are lightweight and highly effective at wicking away moisture, helping to keep you cool and comfortable.
Cotton is a great choice for keeping cool at night. It is a breathable fabric that helps to regulate your body temperature, and its sweat-wicking properties will prevent you from feeling sticky. Opting for organic cotton sheets is a good idea, as these are particularly effective at drawing moisture away from the body.
Linen is another excellent option for hot sleepers. It is known for its breathability, offering the same benefits as cotton, but with the added bonus of being ultra-durable. Linen sheets tend to be soft and cooling, so they will keep you comfortable throughout the night.
Bamboo is a lesser-known but highly effective fabric for staying cool. Bamboo sheets are absorbent, helping to wick away sweat and lower your body temperature. They are also naturally breathable, so they will keep you cool while you sleep.
In addition to choosing the right sheets, it is important to select the right pyjamas. Opting for lightweight pyjamas made from cotton, linen, or bamboo will help to regulate your body temperature and prevent excessive sweating. These fabrics will ensure that you stay comfortable and cool enough to get a good night's rest.
By investing in breathable sheets and pyjamas made from these fabrics, you can significantly improve your sleep quality during hot weather.
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Choose a mattress with good airflow and cooling technology
A good mattress can make a big difference in keeping you cool while you sleep. When choosing a mattress, look for one that has cooling technology and allows for good airflow.
Memory foam mattresses tend to trap the most body heat, so you may want to avoid these. Instead, opt for a mattress with a coil support core, which allows for a lot of airflow. Hybrid mattresses, for example, typically have a breathable coil base with comfort layers on top, allowing you to enjoy the comfort of memory foam without the heat-trapping effects. Some hybrid mattresses also use gel- or copper-infused foams, which enhance their cooling abilities.
The Helix Midnight Luxe, for instance, has three layers of memory foam and individually wrapped coils that help maintain a neutral spine position. One of the foam layers contains a cooling copper infusion, the coils promote airflow, and the pillow top is made from a breathable Tencel material. The Leesa Legend Chill Hybrid mattress also has a cooling cover, gel-infused foam, and a coil base that provides plenty of airflow.
If you're looking for a more natural option, consider the Avocado Green mattress. It has a base made of recycled steel coils, a core composed of naturally sourced and GOLS-certified Dunlop and Talalay latex, and an outer shell of organic wool and cotton. Latex is naturally breathable, and the coils in the Avocado Green mattress provide ample space for airflow.
Another option is the Purple Mattress, which users praise for its cool, breathable nature and its uniquely springy yet cradling feel. If you're on a budget, Tuft & Needle's Original Mattress is a good option, with a layer of gel-infused memory foam at the top that helps draw heat away from your body and an open-cell structure that makes it more breathable.
Additionally, consider investing in cooling sheets or pillows to help you stay cool while you sleep. Look for sheets made with breathable fabrics like organic cotton, linen, or bamboo. Bamboo absorbs sweat, while organic cotton effectively wicks away moisture.
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Install blackout curtains to reflect heat and keep your room cool
If you're looking for a way to keep your room cool without using power, installing blackout curtains is a great option. These curtains are designed with a specific purpose: to reflect heat and prevent it from entering your room, especially during the summer when temperatures are high.
Blackout curtains are made with layers of heat-blocking fabric, creating an effective barrier that prevents warm air from entering and cool air from escaping. This innovative design also blocks out light, creating a darker and cooler environment—perfect for a good night's sleep. The dense fabric construction ensures that your room remains insulated, maintaining a comfortable temperature.
The BGment Thermal Insulated Blackout Curtain is a popular choice, offering a triple-weave design that blocks out 85 to 99 percent of sunlight. This curtain not only regulates temperature but also reduces outside noise and protects your furniture from the sun's UV rays. With over 35,000 five-star reviews, it's a top pick for many.
If you're looking for a more elegant option, the West Elm Worn Velvet Blackout Curtains are a stylish choice. While they don't provide complete darkness, they offer moderate room darkening and have a heavy, satisfying drape. For a more affordable option, Target's Pillowfort Blackout Chambray Cotton Kids' Panels are a good choice, offering reasonable room darkening at a lower cost.
By installing blackout curtains, you can effectively reflect heat away from your room, creating a cooler environment without relying on power. This simple solution can make a significant difference in maintaining a comfortable temperature during warm weather.
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Position fans near open windows to push hot air out of the room
Fans are a great way to cool down a room and your body. They help move the air around the room and your body, offering a sense of relief and increasing the chance of sweat evaporating. However, they don't actually decrease the room's temperature. Therefore, to optimise the benefits of using a fan in a hot room, it is important to position the fan near an open window to pull the hot air from inside the room and push it out of the house. This is especially effective if the window is facing the sun's direction. If the window does not have a sun-facing view, you can still use the fan to push hot air out of the room.
Box fans are particularly useful for this purpose. Place them facing out of the windows to blow out the hot air and replace it with cold air inside. If you have multiple windows in the room, open them all to create a cross breeze, which will help cool the room faster.
If you have an air conditioner, you can position the fan near a vent to distribute cool air around the room. Run ceiling fans counterclockwise in the summer to push cool air down.
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Take a cold shower or bath to lower your core body temperature
Taking a cold shower or bath is a great way to lower your core body temperature and improve your sleep quality. It is generally safe for healthy individuals, but it is always recommended to consult a doctor if you have any concerns or pre-existing medical conditions.
Cold water therapy, or cryotherapy, involves exposing the body to cold temperatures for therapeutic reasons. When you take a cold shower, your body goes into "survival mode" and works harder to maintain its core temperature. This stimulates increased blood flow circulation, delivering freshly oxygenated blood to areas that need to recover. Over time, your circulatory system may become more efficient, which is beneficial for individuals with high blood pressure or diabetes.
Additionally, cold temperatures cause your blood vessels to constrict, directing blood flow away from the surface of the skin and towards your body's core and vital organs. As your body warms up again, the blood vessels expand, bringing oxygen-rich blood back to your tissues. This process helps to flush out inflammation and reduce muscle soreness.
To maximize the benefits of cold therapy, aim for a water temperature below 60 degrees Fahrenheit (15.5 degrees Celsius). You can start by gradually lowering the water temperature until you reach this range. Stay in the cold shower for two to three minutes at a time.
If you want to incorporate this practice into your bedtime routine to promote better sleep, try taking a cold shower or bath one to two hours before bedtime. This will give your body enough time to gently cool down and prepare for a restful night's sleep.
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Frequently asked questions
There are several ways to sleep cool without power. Firstly, you could invest in a mattress with built-in cooling technology, which provides extra airflow and breathability. Alternatively, you could opt for cooling sheets or pillows made from breathable fabric such as organic cotton, linen, or bamboo. Another option is to place a fan near an open window to pull hot air from inside the room and push it out of the house.
To cool down your bedroom, you could try installing blackout curtains, which reflect heat and stop it from entering through the windows. If you have a multi-story home, you could also try sleeping on the bottom floor, as heat rises.
To cool down your body, you could try taking a cold shower or bath, or placing a cold washcloth or ice bag on your neck or wrists. You could also try drinking a glass of cold water or wearing lightweight pajamas made from cotton, which can wick away moisture.
To optimize your bedroom environment, you should unplug or power down electronics, as they produce heat. You should also close the windows when the sun is out and open them when the weather is cool.








































