Downs refer to a type of soft, fluffy feathers found on birds, particularly in their undercoating. These feathers provide insulation, helping birds maintain their body temperature in various climates. Downs are commonly used in products like jackets, comforters, and pillows due to their lightweight and warm properties. In addition to their use in textiles, the term "Downs" can also refer to rolling hills or elevated areas, often covered in grass. These landscapes are typically found in regions like the South Downs in England, which are known for their scenic beauty and biodiversity.