CTOMS 1st Line Medical Bag

First, the 1st Line is not an IFAK or Individual First Aid Kit. It is intended as a Tactical Field Care bubble Treatment Kit, designed for the primary team medic. So, the 1st Line is larger than an IFAK because of the requirement for advanced interventions. It is not removable like an IFAK. A Treatment Kit remains attached to the First Responders/Medics rig. 

A TFC Bubble is not intended for sustained medical treatment. Rapid tactical movement and evacuation to a properly secured Casualty Collection Point happens once the threat is dealt with. In combat, anything that goes on the ground will stay on the ground. A medic without a Treatment Kit on their rig is now a rifleman. As a TFC Bubble is for stopgap lifesaving interventions during an active engagement while under cover, a medic should not be employing or accessing their second line medical kit.