A duvet is a type of bedding used as a blanket on a bed. They are normally made of a cover, filled with feathers or man made fibres such as polyester and hollow fibre. They are soft and comfortable and keep the user warm.
The thickness of the duvet is measured by a tog rating. The higher the tog, the warmer the duvet will be. The warmest duvet would be a 13.5 tog.
All Season Duvets [change]
There is an all season duvet where you get two duvets with different togs, usually a 4.5 and a 9.5.