Down has been treated in a water-repellent solution to enhance down water resistance, improve dry time, and enable loft to be retained far longer in wet conditions than untreated down. In short, hydrophobic down is not as sensitive to getting wet, so is a great improvement over untreated down in unpredictable real-world conditions.
The Responsible Down Standard (RDS) is a certification to ensure that birds used in the sourcing of feather down are treated ethically. All RDS Down is independently certified by Control Union and must meet exacting standards and criteria in the sourcing of the down. All RDS certified down is fully traceable and that down comes from birds that are not subjected any unnecessary harm or to live plucking and force-feeding.