Respiratory trauma backpack for emergency services, contact with paramedics in the UK provided fascinating insights. Existing kit is a tangled bag of tubes, taking vital time to untangle and arrange while a patient may not be breathing. Main innovation here, is the sprung, self-locking reel, housing the air hose which intends to reduce set up time to a minimum, saving lives. Polyurethane's, Polypropylene, Nylon , ABS.