In a strange development, PIA has told its air crew that wearing undergarments is a must, Geo News reported. PIA has claimed that lack of better attire by air attendants is leaving a "poor impression" and "portrays a negative image" of the airline. "It has been observed with great concern that a few cabin crew tend to dress casually while travelling intercity, staying in hotels and visiting various suffices. Such dressing leaves a poor impression on the viewer and portrays a negative image of not only the individual, but also of the organisation," an internal instruction memo sent by PIA General Manager (Flight Services), Aamir Bashir, read, Geo News reported.