Sleep onset is tied to a controlled drop in core body temperature. If your bedding traps heat and humidity, that drop is delayed and you are more likely to toss, wake, and feel unrested.
Cooling bedding helps by reducing thermal friction between skin and sleep surface. But the result depends on full-system fit, including room airflow, mattress ventilation, and material choice. Continue with REM temperature shifts, humidity effects, bedroom airflow strategy, and mattress breathability.
Then apply this science in building a cool bed, choosing cooling sheets, and choosing cooling comforters.
For product examples tied to this framework, use best cooling comforters and best cooling sheets.