Redundant flotation is the key feature of this air-holding tube. High-density, non-absorbent foam is packed into each chamber. In the rare event of a breach in the polyurethane fabric and a loss of air pressure, the packed foam maintains the chambers shape and 90% of it's flotation factor.
A record locator is an alphanumeric code, typically 6 characters in length, used in airline reservation systems to access a specific record.
1 call American Airlines reservations number and ask them; 2  find one of your emails from the airline related to the flight (confirmation, check-in reminder, etc.) where the record locator should appear;  hunt around for your boarding pass either paper or electronic (don't forget your phone);