FLEX B7 FLIGHT - ECHO The B7 FLIGHT-ECHO is exactly the same as the standard B7 FLIGHT, except for two simple changes to make it work slightly better for our Airline Captains. It comes with SPE (water bottle not included) instead of the SPA, and the J-Hook Main Handle instead of the plain Main Handle. This version of the B7 FLIGHT was configured with Airline Captains in mind. Because of their needs and their input, this special version of the B7 FLIGHT different from the standard B7 in the following ways: This bag comes with a SPE instead of a SPA. (We got a ton of requests for a better, larger, adjustable water bottle pocket.) This bag comes with the MHJ (the special Main Handle with slots for a J-Hook), intead of the standard main handle.