What blends of down and feathers are most suitable?

The appropriate blend depends in particular on the individual need for warmth when asleep. Nowadays, most people usually prefer a high percentage of down.
 
Lightweight down provide best fill power values and a high degree of thermal insulation. With a higher percentage of feathers, the weight of the duvets increases, because feathers are heavier than down.
 
Due to large fill power values down are capable of being able to keep the body warm without much weight, that is to say the bulking capacity. A down-filled duvet always contains a blend of down and insulating air-filled pockets. The air-pockets among the single down make the duvet lightweight in relation to its volume. Thus, a down-filled duvet can keep the body warm and comfortable with very little weight.
 
Therefore, down satisfy all requirements for a perfect sleeping comfort: They are light and assure an excellent climate regulation. Pleasant warmth is quickly created and the perspiration absorbed is steadily being eliminated.
 
There are different types of down-filled duvets available. Depending on the filling weight they are manufactured for summer or winter.
Especially, a duvet containing 100 % of down keeps the sleeper pleasantly warm and cosy with very little weight at the same time. Another favoured blend consists of 90 % down and 10 % feathers.
Pillows, however, require a filling material which is able to support the head. In this case, feather-down blends are preferred, but more and more people, however, prefer a soft down-filled pillow.

 

Further information at :

 

Quelle
Verband der Deutschen Daunen- und Federnindustrie e.V.