Vietnam Airlines (VN) has unveiled a new set of uniforms for its in-flight crew, aiming to build consistent brand identity for the flag carrier in 2015.

After 15 years of using the iconic red ao dai (traditional Vietnamese dress), the flag carrier has kept the traditional dress for female flight attendants, but changed the color from red to blue, for economy class, and yellow, for business class. Pilots and male attendants will continue to wear white shirts, but there are some changes in materials and cloth patterns.

The new colors suit the interior designs of the new Airbus A350 and Boeing 787-9, which are scheduled for delivery in the middle of this year. Yellow represents for air hostesses while blue represents for the rest of flight attendants. The new materials meet aviation safety standards, such as prevention of heat and cold; they do not catch fire easily and create a feeling of comfort for the wearers during the longer flights.

Vietnam Airlines staff started wearing the new uniforms on selected Boeing 777 and Airbus A330 flights from Mar. 3 to 9 under a trial program, in which feedback from passengers and members of the public will be welcome, the carrier said. Passengers flying between Hanoi and Ho Chi Minh City and Japan, South Korea, Australia, the UK, France, and Germany with Vietnam Airlines will be served by attendants wearing the new costumes.