Top tips to stay cool while you sleep

Too hot in bed | scooms bedding

My son was too hot last night in bed. His forehead was very sweaty. Time to change his 9 tog scooms duvet to a 4.5 tog!  But what else could I do to help him sleep better now that the nights are getting warmer? I've had a good look into how to stay cool in bed. Read our top tips!

  1. Too hot to sleep
  2. Keep your bedroom cool
  3. Lower your body temperature before bed
  4. Cool down in bed
  5. What to wear to bed when it's hot

Too hot to sleep
Research shows that we need the right temperature to sleep, around 18°C, and if our bedrooms are hotter than that, it will take us longer to fall asleep. Our sleep may also be disturbed as we toss and turn, wake-up and go back to sleep, which means we won't get enough deep sleep and REM sleep, which is when our bodies and memories restore and repair.

‘Your body temperature needs to drop slightly before you go to bed, which is why you just can’t sleep when you’re too hot. An ideal bedroom temperature should be around 16 to 18°C, so it can be difficult to get comfortable in a hot and stuffy space, which leaves many people suffering from a disturbed night’s sleep,’ according to Simon Williams of the National Bed Federation (NBF).

In hotter countries, many people use air conditioning to keep their bedrooms cool but this isn't very common in the UK. So how can we keep our bedrooms cool without AC?


Keep your bedroom cool

  • Relocate to a cooler room - A north-facing bedroom will be cooler. And as heat rises, it may be cooler to sleep downstairs.
  • Encourage airflow - Open windows and doors to create a draft that will flow through your room. If you have a hatch to the attic or roof, open this as hot air rises and will travel up towards the hatch.
  • Block the sun - Keep your curtains and blinds drawn throughout the day to keep the heat of the sun out of your bedroom. Shutters and blackout blinds are great for the hot weather, preventing light entering but allowing air to circulate.
  • Turn off the electrics - All appliances and lights give off heat so switch off anything you don't need on. Although a fan can be handy!


Lower your body temperature before bed

  • Have a shower or bath - A warm shower or bath will trigger your body's natural cooling response. A cold shower can also help you feel cooler.
  • Drink cold water - And take it to bed with you and sip if you're hot. 
  • Avoid caffeine, alcohol and eating late - They can make you dehydrated and hot during the night as your body works to digest food and reacts to the alcohol or caffeine.
  • Don't exercise too late - Avoid rising your temperature too close to bedtime.
  • Practise mindfulness - Calming yourself before bedtime can help you relax and cool down before going to sleep.
  • Cool your pulse points - Use a cold flannel as a compress on your wrists and neck.
  • Try lavender oil - Essential oils like lavender can aid sleep. Put a couple of drops on your pillow and breathe it in as you drift off to sleep.


Cool down in bed

  • Lower your duvet tog - scooms recommend a tog rating of 7.5 or lower. A 2.5 tog duvet or 4.5 tog duvet is ideal for the summer months. 
  • Go natural -  Naturally breathable duvet fillings like  goose down, offer up to four times better air circulation than synthetic duvet fillings. Cotton is temperature regulating and sweat wicking so your duvet casing and bed linen - duvet cover, sheets and pillowcases - should be 100% cotton rather than synthetic.
  • Cooling bed products - I haven't tried any but there are various cooling bed products available that you might want to try including a gel insert for your pillow, as well as cooling mattresses, protectors and covers.
  • Refrigerate your bedding - If your bedroom is feeling really hot you could try popping your pillowcase or sheet in a freezer bag and sticking it in the fridge for a couple of hours before you go to bed. Or fill a hot water bottle and keep it in the fridge or freezer until you want to tuck in.
  • Stay away from a hot partner - If your other half is a hot sleeper, you might want to make sure you both sleep in your bit of the bed rather than snuggling in the middle together!


What to wear to bed when it's hot

  • Wear cotton - You may be tempted to go commando but cotton nightwear allows your skin to breathe and absorbs any perspiration, unlike synthetics, satin or silk.
  • Tie your hair back - Keeping your hair off your neck can help you stay cooler.
  • Cool your feet - Cooling or warming your feet will lower or raise your body temperature. Try cooling your socks in the fridge for a couple of hours before bed.



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Bedding size guide


These are standard UK bedding measurements so if you know your mattress size, you can easily work out which duvet size you need. (Width x length.)

UK sizes Duvet size Mattress size
Single 135 x 200cm (53 x 79") 90 x 190cm
Double 200 x 200cm (79 x 79") 135 x 190cm
King 225 x 220cm (89 x 87") 150 x 200cm
Super king 260 x 220cm (102 x 87") 180 x 200cm 

US/CANADA BEDDING SIZES: Approximate matches to UK sizes are US King/UK Super king, US Queen/UK King,  US Full/UK Double and US Twin/UK Single.

EUROPEAN BEDDING SIZES: Each size - Single, Double, King and Grand king - is a little larger than the UK equivalent.

Measure your mattress to see which size bedding you need: our UK v European v US mattress comparison guide.



Young children can overheat so if they are old enough to use a full size bed, we recommend using a single size 4.5 tog duvet.

 Tog rating Season / heat Feel
2.5 tog High summer / hot sleepers Light thermal insulation
4.5 tog Summer Lower thermal insulation
9 tog Spring & Autumn Cosy medium heat
All season (4.5 + 9 tog) Winter / cold sleepers Very warm



Our goose down duvets have high 700 fill power. Fill weight is measured in GSM (grams per square metre).

Fill weight (not total duvet weight)
Single All seasons - 788gsm
9 tog - 486gsm 
4.5 tog - 302gsm 
2.5 tog - 220gsm
Double All seasons - 1168gsm
9 tog - 720gsm
4.5 tog - 448gsm
2.5 tog - 320gsm
King All seasons - 1478gsm
9 tog - 911gsm
4.5 tog - 567gsm
2.5 tog - 400gsm
Super king All seasons - 1671gsm
9 tog - 1030gsm
4.5 tog - 641gsm
2.5 tog - 480gsm



Our pillows come in two sizes and provide medium support. (Width x length.)

Standard  50 x 75cm
King 50 x 90cm



Our fitted sheets are deep fit, up to 40cm / 15.7" mattress depth. And our duvet covers fasten with large, easy to use buttons. (Width x length.)

Duvet cover Fitted sheet Flat sheet Pillowcase (pair)
Single 140 x 200cm 90 x 190cm 180 x 275cm
Double 200 x 200cm 135 x 190cm 230 x 275cm 50 x 75cm (Standard)
King 230 x 220cm 150 x 200cm 275 x 275cm 50 x 90cm (King)
Super king 260 x 220cm 180 x 200cm 305 x 275cm

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