With heatwaves set to continue through the summer, your bedding could be the difference between staying at a comfortable temperature at night, and feeling like you’re sleeping in an oven. For a more comfortable night’s sleep, it’s worth paying attention to the duvet’s tog rating (which stands for thermal overall grade).
Contrary to what you might think, the tog rating doesn’t refer to the thickness or weight. Instead, its tog actually means “how much heat it traps”, explains Hannah Shore, head of sleep science at Mattress Online. “The higher the tog, the more heat it traps and therefore the warmer the sleeping environment.”
