Are down and feather duvets damaged when they are compressed during the transport?

To save space, bedding products can definitely be compressed during the transport which is the same thing that happens during the sleep: Though the down and feathers are compressed, they stay resilient. If they are fluffed up afterwards, they will quickly recover their old shape.

 

However, down and feathers will be damaged, if they are compressed and stored for a long time that way.