Bandages are an essential component of first aid kits and are used to protect wounds, cover burns, support bones and soft tissues, control bleeding, and secure dressings. The main types of bandages are roller bandages, which are used to immobilize injuries and control bleeding; tubular bandages, used for ankle sprains, arm injuries, and knee support; and triangular bandages, which can form slings to support injured limbs. Proper bandaging techniques include circular, spiral, and figure-of-eight patterns to stabilize injuries in an effective manner.