I’ve seen “fur arrow tracers” selling on some specialty sites for as much as $5 for enough material to wrap a dozen arrows.
Or, you can go to just about any fly shop (or some craft shops) and buy rabbit fur “zonker strips” in a sufficient quantity to wrap 6 dozen arrows or more for about $2.50. Slap a little Barge cement on the backside of the rabbit strip, wrap it, and you’re set:

Great for shooting in low light conditions and being able to track your arrow flight, and quite helpful for finding ‘misplaced’ arrows as well. And I don’t find that they affect arrow flight at all.