- The flakes are smaller than those of goose down, so you need more to fill the blanket.
- The insulating effect of duck down is lower than that from geese, meaning more down is required, resulting in a heavier blanket.
- Duck down absorbs less moisture, making it less suitable for people who tend to sweat during their sleep.
- Down and feathers from ducks are also less flexible and durable. They don't last as long and thus provide slightly less comfort.