Emergency Trauma Dressing Trainer Refill is designed for Zoll Mobilize Rescue Systems that include medical and trauma supplies. When employed, the rescue system is paired with an interactive application that provides real-time instructions on how to use the supplies. Step-by-step directions provided through the Mobilize Rescue app enable untrained bystanders to help assess and manage medical emergencies while EMS is en route, but the effectiveness relies on the supplies being available to rescuers. This dressing, labeled Item B2 in the system, keeps pressure on a wound after the bleeding has stopped.