THAI is one of the few airlines with an in-flight uniform change policy. Female flight attendants on international routes are required to change from their corporate purple suits (for use outside the cabin) into traditional Thai dresses (as seen on the company's marketing campaigns) prior to the general boarding of passengers. They are also required to change back into the former prior to disembarkation. Consequently, traditional Thai dresses are only visible to the traveling public on-board THAI aircraft or in THAI's premium lounges in Bangkok. Cabin crew of nationalities other than Thai are not allowed to wear the traditional Thai attire. Male flight attendants also have on-board suit jackets that differ from those worn on the ground.