Sleeping Bag Layering Guide Inline
Choose the right weight for your space
ALL SEASON (0.7–2.4 tog equivalent)
Ideal for nursery temperatures between 17–27°C.
SUPERWARM (2.5–3.5 tog equivalent)
Containing the highest Merino content available, this is our extra cosy winter optimised option designed especially for colder environments (or little ones who feel the cold more than usual)
Ideal for nursery temperatures between 10–21°C.
On Underlayers & PJs
Your baby’s sleeping bag is just one part of their sleep system. What they wear underneath matters too - because those layers sit closest to the skin.
We always recommend choosing natural, breathable fibres for underlayers.
Merino in cooler conditions
Merino wool naturally helps regulate body temperature. It gently warms when it’s cold, releases excess heat when it’s warm, and manages moisture so skin stays dry and comfortable. This supports a more stable temperature through the night - especially in winter, cooler homes, or when rooms cool overnight.
That’s why we see the best results in cooler conditions when Merino underlayers are paired with a Merino sleeping bag - they’re designed to work together.
Cotton and bamboo in warmer weather
Cotton and bamboo are lovely in warm conditions, but in cooler rooms they tend to hold moisture, which can feel cooler against the skin and reduce the insulating effect of the outer layer.
The simple takeaway
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In warm rooms or summer: cotton, bamboo or Merino can all work well.
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In cooler rooms or winter: Merino underlayers tend to give more consistent warmth and comfort.
There’s no “must” - just a little fibre science to help you choose what works best for your baby and your home.
