GSM stands for grams per square metre. It’s a measure of a duvet’s weight based on the density of the fabric material. Essentially, it tells you how heavy or thick the duvet is, which can help you determine its warmth and suitability for different seasons.
Here’s a breakdown of GSM weights and what they typically mean for duvets:
- Lightweight (150–300 GSM): Ideal for warmer months or hot sleepers who need a lighter cover that doesn’t trap too much heat
- All-Season (300–400 GSM): A versatile option that works well for most climates and sleepers, offering a balance of warmth without being too heavy
- Winter (400+ GSM): Designed for colder months or for those who prefer a very warm and cozy duvet
Higher GSM duvets are usually warmer and better for colder weather, while lower GSM options are cooler and lighter. However, factors like the type of fill (e.g., down, wool, polyester) and the construction also influence how warm or breathable a duvet feels. Make sure to consider GSM in the context of these other features.