What type of fiber is described as having a soft and downy texture?

The fiber characterized by a soft and downy texture is wool. Wool fibers come from sheep and other animals, and they possess natural crimp and elasticity, which contribute to their softness. This texture is inherent in the structure of wool, making it feel plush and warm against the skin, which is why it's commonly used in garments meant for comfort and warmth, such as sweaters and blankets.

Cotton, while also soft, does not have the same downy texture as wool and is typically smoother and cooler to the touch. Polyester is a synthetic fiber that can be made to feel soft, but it often lacks the natural softness and texture associated with wool. Silk has a smooth and lustrous texture rather than being downy, making it quite different from wool's softness.