Belle's odd flight suit (the Emergency Buoyancy Garment, E.B.G.) has more that one purpose.
•It accommodates Miss. Barr's peculiar physical condition.
•It doubles as a floatation device in case of a water landing for your passengers and cargo.
•It adds a little extra shock absorption for when you have to bail out of your blimp when, say..the gas bag catches fire and it's full of hydrogen.