Woollen pyjamas are better than cotton for a good night’s sleep, according to new research.
Light woollen PJs work better regardless of bedding textile, says Sydney University PhD candidate Mirim Shin, who is presenting her research in Brisbane on Thursday.
A big advantage is that people fall asleep quicker, she says.
The only problem is few shops sell woollen pyjamas and finding a pair could cause sleepless nights.
That does not worry Ms Shin’s research supervisor, Dr Chin Moi Chow, who enjoys snuggling up in an old woollen jumper.
“I love it. It’s warm and comfortable in winter,” says the senior exercise and sports science lecturer.
“Most people think cotton breathes better, but we have shown wool is a lot more comfortable and people sleep better.”
A previous study among Australian university students said about a third prefer cotton, a third sleep in synthetic material and a third sleep in the nude.
The researchers say woollen pyjamas have better insulation and absorption qualities than cotton.
Ms Chin’s study, presented at the Sleep DownUnder conference, shows people in light-weight, long-sleeved woollen PJs fall asleep quicker than those in cotton and stay asleep longer.
An ambient temperature of 17C is better than 22C for a longer, deeper sleep but temperature has no affect on how quickly people fall asleep.
There is also no difference between synthetic and woollen bedding.
Ms Shin says the beauty of her finding is that sleeping apparel is easy to modify and does not need lifestyle changes for people who struggle to fall asleep.
* Clifford Fram travelled to the conference courtesy of the Australasian Sleep Association