What really makes a difference in choosing the right duvet is to ensure it is temperature regulating. It should also be soft and cuddly. Quilts filled with down and feathers, meet these criteria.
Duvets and pillows filled with down and feathers can also be used by people with house mite dust allergies.
What actually happens in a down and feather factory?
How are down and feathers actually washed? How are they separated? How are they mixed? How is the quality controlled?