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Sleepthru Aerotemp Sleeping Bag
Sleepthru Aerotemp Sleeping Bag
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Description
Description
Featuring Outlast® temperature-regulating technology, this smart fabric actively balances body heat: absorbing excess warmth, storing it, and releasing it back as needed. Originally developed by NASA for use in spacesuits, it helps your baby maintain an ideal sleeping temperature all night long, reducing the risk of overheating or waking from chills.
Made from 100% organic cotton, the SleepThru Sleeping Bag is soft, breathable, and free from harmful materials. It’s fully tested to EN16781 safety standards, so you can rest assured your baby is sleeping safely.
With clever poppers at the armholes and back, this bag adjusts as your child grows, providing a perfect fit from 3 to 24 months. A practical two-way zipper makes nighttime changes simple, so you can get baby back to sleep with minimal disruption.
Choose between Summer Nova for warmer nights or a Winter Orbit, cosier bag for cooler months, with two calming colourways to suit every nursery.
Shipping Information
Shipping Information
Processed Within 1 Business Day
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- Standard (1-3 days) - £3.95
- Next Day - £6.00
Limited to Mainland UK
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Size
Size
Suitable from 3 months (or 5KG) to 24 months
Safety Information
Safety Information
Fully tested to EN16781 safety standards, so you can rest assured your baby is sleeping safely.
Designed With Intention
Buttery Soft Cotton
Made from 100% organic GOTS-certified cotton that’s ultra-soft, breathable and gentle on delicate skin.
Easy Night Changes
A clever two-way zipper allows for quick nappy changes with less disturbance during the night.
Grows With Your Baby
Designed to fit from 3–24 months, with cleverly placed poppers for a safe, adjustable fit.
What makes temperature-regulating sleeping bags better for babies?
Babies can’t control their temperature well because their little bodies lose heat quickly and can’t sweat or cool down as efficiently as adults. Our bag helps keep them comfy by absorbing extra heat when they’re warm and releasing it back if they cool down, so they stay settled and sleep better.
Why doesn’t this sleeping bag have a TOG rating?
Traditional TOG ratings work for fabrics that stay the same warmth all night. Our bag is made with Outlast® technology, which actively stores and releases heat to keep your baby’s temperature more stable. Because it adapts as they sleep, a single TOG number wouldn’t be accurate (or helpful!).
Instead, just check our simple clothing guide and room-temperature tips, they’ll help you dress your little one safely and comfortably without worrying about a fixed TOG.led and sleep better.
Should I choose summer or winter?
Because the fabric adapts to your baby’s temperature, you don’t need to worry as much as with TOG bags, but winter is a little heavier and cosier and suitable if the room temp goes below 20 degrees.
Was this really made by NASA?!?!
Yes — the Outlast® technology inside our sleeping bags was originally created under a NASA space programme. It was designed to help astronauts stay comfortable when temperatures in space shift quickly. We’ve taken that same clever heat-balancing tech and woven it into baby sleepwear, so your little one can stay more comfortable while they sleep.
How Aerotemp™ Technology Helps Regulate Temperature
Heat Release
Excess heat is released from the body
Heat Storage
Heat is absorbed and stored by the fabric
Cooling Comfort
Body cools down naturally
Adaptive Warmth
Fabric releases heat back when needed
Balanced Sleep
Body’s microclimate stays balanced
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Intentionally Designed