Down as a filler for clothing, especially for down jackets has several advantages that make it a popular choice:

Excellent insulation: Down is highly insulating. Its natural fibres create air pockets that trap heat and provide excellent thermal protection in cold conditions.

Lightweight: Down is a lightweight and voluminous material, which makes clothing using it comfortable and does not create a feeling of being overweight.

Longevity: Quality down is durable and can retain its insulating properties for a long time.

Breathability: Down is breathable, which helps to regulate body temperature, preventing overheating and ensuring comfort.