What is a "down jacket"?

A down jacket is a type of insulated jacket that is filled with soft and fluffy down feathers or synthetic materials to provide warmth in cold weather conditions. Down jackets are typically lightweight and compressible, making them easy to pack and carry, yet they provide excellent insulation by trapping body heat. They often feature a water-resistant or waterproof shell to protect against snow or rain, and may include a hood for added warmth and protection. Down jackets come in a variety of styles, including pullover, zip-up, or hooded, and are a popular choice for outdoor activities such as skiing, hiking, or mountaineering, as well as for everyday wear in cold climates.