One of the less discussed but an important part of an airsofter's kit is the Kill Rag. Why use a Kill Rag than raise your hand when you're hit, Fox Airsoft tells more... "'How do people tell if they hit each other?' That's a common question from people getting to know our sport. An optional item you could carry is a kill rag/dead rag. Its effectiveness is subjective so just take this as information. It is not a necessary item though it could make your airsoft life just a little bit easier. It might be required at some of your local events or fields."