Wool pajamas mean better sleep. A study of sleep clothing and bedding in wool, cotton, and polyester showed that those who wore wool pajamas either in warmer or cooler weather had less sleep disturbance than those who slept in or on cotton or polyester.
Why? Water and air.
Wool absorbs moisture and wool regulates temperature through air pockets, both of which leave a sleeper more comfortable and less likely to wake up. Both moisture and air temperature change influence body temperature.
Sleep comfort comes down to temperature.
Sleep comfort, even more important with babies
Babies cannot regulate their own body temperature the way you do. Babies can lose or gain heat very quickly.
If you could help a baby to sleep more comfortably, would you?
Wool helps babies (and adults) sleep better. For a baby under 12 months, sleeping on or in wool gives the benefits of temperature regulation without the risks of soft, puffy bedding.
Sleeping on a wool mat is more comfortable because wool absorbs moisture (sweat and urine—probably drool) and the breathable fabric allows for some air movement.
Sleeping in a wool sleep sack or in wool pajamas has a similar effect.
Especially with babies, you can take a simple step to improve sleep quality:
sleep on a wool mattress pad.
- Mirim Shin, “The effect on sleep of fabric for sleeping apparel and bedding,” PhD diss., University of Sydney, 2014. http://hdl.handle.net/2123/13492
- Mirim Shin, Mark Halaki, Paul Swan, Angus Ireland, and Chin Moi Chow. “The effects of fabric for sleepwear and bedding on sleep at ambient temperatures of 17C and 22C.” Nature and Science of Sleep 8 (2016): 121-131. https://www.dovepress.com/the-effects-of-fabric-for-sleepwear-and-bedding-on-sleep-at-ambient-te-peer-reviewed-article-NSS
- Sarah Lonsdale, “Eco living: could wool bedding help you sleep better? Studies suggest that wool bedding can improve how people sleep, particularly if they suffer from skin conditions such as eczma.” The Telegraph, January 30, 2013. http://www.telegraph.co.uk/finance/property/green/9831714/Eco-living-could-wool-bedding-help-you-sleep-better.html