There’s a seasonal reason to sleep on real silk. More than pure cotton, pure silk is cooling for hot sleepers. In actuality, it isn’t just cooling.
Real, pure silk, when you get technical about it, is insulating. This means that when you are cold, it feels warmer. Sometimes Winter trekkers and climbers use base layers under their clothing that has a large silk make up in it.
If you tend to sleep hot, real, pure silk is your friend. This is especially true in the Summer and even more relevant if you don’t have air conditioning.
It’s also great for sleepers who are hot due to hormone changes like pregnancy or menopause or those who are sleeping hotter than usual due to medication side effects.