Does a Cooling Blanket Work Over a Sheet?

Getting Comfortable Sleep in the Summer Heat

As temperatures rise in the summer, many people find themselves tossing and turning through hot, restless nights. Heat and humidity can make it incredibly difficult to stay cool, even with air conditioning. Investing in some cooling bedding is an excellent way to regulate your body temperature as you sleep. 

If you have recently purchased or are considering a cooling blanket, will it still work effectively over a sheet? Understanding cooling blanket technology and best practices for layering your bedding will help ensure you are comfortable all summer.

What Is a Cooling Blanket and How Does It Work?

A cooling blanket is bedding engineered specifically to dissipate body heat, whisk away moisture, and create a comfortable microclimate for sleep. There are several key technologies used:

Phase Change Materials: Tiny microcapsules of paraffin wax absorb and release heat during solid and liquid phase changes, regulating temperature.

Moisture-Wicking Fabrics: High-performance textiles like Outlast viscose pull sweat away from your skin.

Gel Infusions: Strategic gel placements distribute and even out body heat across the blanket surface area.

Additional Features May Include:

- Antimicrobial properties to inhibit odor and bacteria

- Super soft bamboo or cotton covers  

- Weave patterns to maximize airflow and breathability

- Attached elastic or thin straps for securing in place

By wicking away moisture and releasing excess trapped body heat, cooling blankets create a cushion of cooler air next to your skin so you don't overheat while you sleep in a cooling blanket.

Read Also - Which Side Do You Sleep With a Cooling Blanket? 

Should You Use a Cooling Blanket Over or Under a Sheet?

Cooling blankets are designed to go directly on top of your mattress to pull heat and sweat away from your body most effectively. However, most manufacturers do not recommend placing them directly on your mattress without any sheet barrier.

Using your cooling blanket over a lightweight, breathable sheet allows for optimal temperature regulation while keeping hygienic separation between your body, the blanket, and the underlying mattress.

If using both a sheet and cooling blanket, it is best to layer the sheet on first against the mattress and then add your cooling blanket on top to be in direct contact with your body.

What Kind of Sheet Is Best Under a Cooling Blanket?

To allow for maximum airflow and cooling blanket efficiency, select a thin, moisture-wicking sheet:

- Bamboo sheets- promote airflow and quickly evaporate moisture

- Microfiber sheets have moisture-management properties while retaining softness

- Athletic performance sheets use technical fabrics that release heat

- Cotton sheets should be lightweight percale-woven for optimal breathability 

Avoid using flannel or heavier sheets under cooling blankets, as they retain more heat and moisture. Cooling performance can decline significantly if thicker sheets trap heat against your body.

How to Layer Bedding with a Cooling Blanket for Hot Summer Nights

Here are some top tips for layering bedding over your cooling blanket:

- In the hottest months, forgo additional blankets or duvets so your cooling blanket can work its magic unobstructed

- Add a lightweight duvet or woven blanket in cooler weather for weight without excessive insulation

- If needed for comfort, place additional blankets underneath your cooling blanket to prevent buffering performance

The key is avoiding too many heat-trapping layers on top of the cooling blanket technology against your skin. Let it make direct contact with your body for best results. But you can experiment with layers underneath for cushioning that doesn't inhibit airflow.

Caring for High-Tech Cooling Blankets

These modern cooling blankets contain special materials and technology, so follow all manufacturer's care recommendations closely to prevent damage:

- Wash on a gentle cycle using cold water to protect sensors

- Skip the dryer and allow to air dry to replenish phase change materials fully

- Avoid fabric softeners or dryer sheets that could clog moisture-wicking fabrics

With proper use and care, a quality cooling blanket can transform your bed into a refreshing oasis for many summer nights ahead.

FAQs: Using Cooling Blankets Over Sheets

  1. Does the sheet impact the cooling performance?

Using a lightweight, breathable sheet over your cooling blanket should not significantly affect performance. Just avoid thicker sheets that can retain more heat.

  1. What about using a cooling blanket with a duvet?

Yes, a cooling blanket can be effective under a lightweight duvet or blanket. The duvet provides weight without excessive heat retention.

  1. Should the sheet go over or under the cooling blanket?

It's best to lay the sheet underneath the cooling blanket, placing the cooling technology up against your body.

  1. What kind of sheets work best?

Choose moisture-wicking performance sheets, like bamboo, for the most breathability and least heat retention under your cooling blanket.

  1. Can I put a mattress protector and a cooling blanket under the sheet?

Yes, using a thin, breathable mattress protector is fine. Ensure any plastic membranes have good airflow so heat dissipation is not blocked.

  1. Can I Use a Cooling Blanket All Year Round?

Absolutely! While cooling blankets keep you cool in hot weather, they also regulate temperature year-round. The phase change materials and moisture wicking will keep you comfortably dry and temperate no matter the season. Cooling blankets are also used in hospitals


A cooling blanket is an excellent investment for better, more comfortable sleep during warmer months. Place it right up against your body for the most cooling power and whisking away excess moisture. A thin, breathable sheet allows for temperature regulation and mattress protection. With the right bedding layers tailored to your preferences, you'll finally get that elusive solid summer's night sleep!