Originally used for immediate hemorrhage control on the battlefield. Each Dressing actually includes 2 pads, 1 for the entry wound and 1 for the exit wound. Or both pads could be used together for a single larger wound. These are brand new Dressings, still in the package. The use-by date has come and gone, so actual effectiveness can't be guaranteed. Perfect for staying prepared around the base or on missions in the field!