Down jackets are insulated outerwear designed to provide warmth in cold weather. They are filled with the soft feathers from ducks or geese, known as down, which trap heat and create a lightweight yet effective barrier against the cold. The outer fabric is often water-resistant or waterproof, making these jackets suitable for various outdoor activities. These jackets come in various styles and thicknesses, catering to different climates and personal preferences. Popular among hikers, skiers, and urban dwellers alike, down jackets are valued for their compressibility, allowing them to be easily packed away when not in use.