What does TOG mean on a duvet?

In the UK or Ireland, a "heavy" duvet is a year-round staple. In Spain, however, getting the TOG rating wrong can lead to some very uncomfortable, sweaty nights. But what exactly does the term mean, and why does it matter?

What does TOG mean on a duvet?

The Science: What is a TOG?

TOG stands for Thermal Overall Grade. Essentially, it is a measure of thermal insulation. The higher the tog rating, the more heat the duvet retains. It has nothing to do with the weight of the duvet (a synthetic duvet can be light but have a high tog), but rather its ability to trap air and keep you warm.

Choosing the Right TOG for the Spanish Climate

On the Costa del Sol, we deal with extreme temperature swings between August and January. Here is a breakdown of which tog you need:

• 4.5 TOG (Summer Weight): This is the gold standard for Spanish summers. It’s lightweight and breathable, providing just enough coverage to feel comfortable without causing you to overheat when the night temperatures stay above 20°C.
• 10.5 TOG (Spring/Autumn): Perfect for those "in-between" months or for homes that have efficient air conditioning in the summer. It provides a medium level of warmth.
• 13.5 to 15 TOG (Winter Weight): Many people think Spain doesn't get cold, but coastal homes are often built to stay cool and can feel very chilly in February. A 13.5 tog is ideal if you don't like running the heating all night.

Does the Filling Affect the TOG?

While the TOG rating tells you how warm it is, the filling tells you how it feels.

• Natural (Down/Feather): Excellent at regulating temperature and usually feels "loftier."
• Synthetic (Hollowfibre): Great for allergy sufferers and easier to wash, which is important in humid coastal environments.

The "All-Season" Solution

If you don't want to store multiple duvets, look for an All-Season Duvet. These usually consist of two separate duvets (e.g., a 4.5 tog and a 9 tog) that can be poppered together to create a 13.5 tog duvet for the coldest weeks of the year.