Index Feather

The index feather is one of the feathers on the arrow – usually distinguished by color – and points away from the bow when the arrow is nocked. It ensures that the arrow is correctly nocked, prevents any feather from brushing against the bow window or arrow rest, and helps the arrow fly cleanly and stably. In classic three-feather setups, one feather is the index feather, while the other two are called the side feathers.