This will enable fisherman to remain on the stream while others are headed for their cars. Zingers are small pin-on devices that fisherman can hang tools on to avoid reaching in and out of pockets. They have a retractable cord that keeps accessories handy but out of the way. Nippers are a small extra sharp pair of nail clippers that are found dangling form zinger on most fly vests. They are used to cut line and trim leader tags.
Some models have small needles that are useful in clearing the eyes of hooks.
Every fly fisherman should wear sun glasses on the river. They will protect your eyes during casting and from harmful sunrays. Polarized glasses will reduce the amount of glare and help you to see the fish. They are also used to dry out your flies when you are finished fishing. A good fly box can save you hundreds of dollars in flies.