The Tactical MOLLE Pouch System (Army Green) Constructed from heavy-duty, water-resistant nylon for rugged field use. Critical for managing open chest wounds from trauma. Nasopharyngeal Airway (I.D. 7.0 mm) : Also known as a nasal trumpet, this soft, flexible PVC tube is inserted through the nose into the oropharynx to maintain an open upper airway in unconscious or semi-conscious patients.