No, inflatable seatbelts are not meant to be used as floatation devices. That would be a good guess judging solely by the name. Actually they are designed to offer back seat passengers additional protection during a car crash.
The inspiration for Ford's inflatable seatbelts (which made their debut in the 2010 Explorer SUV) came from an existing safety device proven to protect front passengers: the airbag. Covered in super-soft webbing, the inflatable belts may also encourage more back-seat passengers to buckle up- or, at least that's the hope. Past studies have shown that backseat passengers are significantly less…