what is tog in duvet

Tog is a measure of thermal resistance or thermal insulance of a unit area, commonly used in the textile industry and often seen quoted on duvets). A tog rating describes the warmth of a product and is widely used in the UK to explain the warmth level of duvets. The higher the tog rating, the warmer the duvet will be. However, tog ratings should only be used as a rough guide to how warm you’ll be, as they are calculated in a laboratory on a flat surface, and how the quilt drapes around you is very important. Most commonly bought togs in the UK are between 10.5 and 13.5 to guarantee warmth in the typically chilly UK weather conditions. Historically, people used to select a duvet according to the season, with 4.5 tog duvets used in the summer months and 15 tog duvets used during the winter months. However, recent advances in duvets and increased usage of central heating have meant that all-season duvets are the preferred option for most people. A few manufacturers have marketed combined duvet sets consisting of two duvets, one of approximately 4.5 tog and one of approximately 9.0 tog, which can be used individually as summer (4.5 tog) and spring/autumn (9.0 tog) ). When joined together using press studs around the edges, or Velcro strips across each of the corners, they become a 13.5 tog winter duvet and as such can be made to suit all seasons).