It is that compact, lightweight and robust and can be placed always ready at hand. If on a motorbike, a car, on board, attached to a drone or worn. To provide first help it can be thrown to another person. For a drone there are two use cases: First - the flotation can be carried directly to a person with a Restube automatic drop or lay system. Second - the system can be attached to a drone to keep a crashed drone afloat for recovery. Restube automatic is reusable by screwing in a new original 16g CO2 cartridge and the water activator. You can get both in a set. Inflates with water contact within seconds Also inflatable by pulling the triggerInflatable also with mouth valve Easy to repack with CO2 cartridge & water activator Light enough to be thrown far distance Horizontally and vertically attachable to a belt (not included) Carry it by drone (from 900g payload) Connection for drone drop & lay mechanism in the bag