How heavy is the duvet?
The duvet should not feel very heavy or dense. The higher the quality of the duvet, the lighter it will be. If a duvet feels heavy, its filling probably has a high percentage of feathers. The higher the percentage of feathers, the lower the quality of the duvet. Obviously, a duvet with 1000 grams (2.2 pounds) of pure down in its filling with be more expensive than one with just 500 grams (1 pound). The flexibility of the down and its ability to trap air (another measure of its quality) are what allow it to maintain a consistent temperature. The lighter and more flexible the duvet, the greater the capacity for air. It takes more ounces of the stiffer, smaller down feathers from young birds to obtain the effect of a smaller quantity of elastic down from mature birds. Because the lighter down from mature birds is of higher quality, the highest quality duvets tend to be lighter and generally have a higher price.
