Hydrophobic down
Hydrophobic down is a type of down that has been treated with a water-repellent chemical to make it more resistant to moisture. It can absorb less water, dry faster, and keep you warmer when wet than untreated down. However, it also has some drawbacks, such as losing some of its loft and warmth-to-weight ratio. Hydrophobic down is suitable for wet or humid conditions, but it may not be as durable or natural as regular down
See also