Chenille is a type of material that is commonly used in fly tying. It is a soft, fuzzy yarn-like material that is made from twisted fibers and is often used to create bodies on fly patterns. Chenille is available in a wide range of colors and sizes, and it can be made from a variety of materials including wool, silk, and synthetic fibers.

In fly tying, chenille is typically used to create the body of the fly. It is wrapped around the hook shank in a series of closely spaced turns, forming a smooth, segmented body. Chenille can be used to create a variety of fly patterns, including nymphs, streamers, and wet flies. It is a versatile material that is easy to work with and can be manipulated to create a variety of different effects. Chenille is a popular choice among fly tyers due to its durability and the wide range of colors and sizes available.