Allegedly invented by the French, FIL-A-FIL A fabric where a white thread is interwoven with the coloured thread, end upon end
A 2 ply weave of different color yarns that run parallel against each other so that both colors are visible
A special type of combination in which two round trip fares are combined to produce a complete itinerary From To Rule AAA BBB Rule 1 BBB CCC Rule 2 CCC BBB Rule 2 BBB AAA Rule 1