What is an essential item to include in a first-aid kit?

An extra towel is an essential item to include in a first-aid kit because it serves multiple purposes in medical emergencies. Towels can be used for applying pressure to a wound to stop bleeding, as a sterile dressing, or to clean the area around an injury. In addition, a towel can help provide comfort to an injured person, maintain warmth, or protect against the elements if needed.

In contrast, while a flashlight is useful for general outdoor activities or emergencies, it does not directly assist in first-aid situations. A compass, valuable for navigation, is unrelated to first-aid needs. Fishing gear is not appropriate for a first-aid kit, as it does not contribute to medical care or injury management.