The outer shells are made of aluminum composite similar to aircraft wings that reflect changing surroundings according to time of the day. Its morning vibe comes from the indigo blue color of the sky. The material entirely absorbs light and shadow, while creating strong contrast with the bright, reflective exterior. The long stripe of the shell looks like a road that runs straight and cantilevers to the air and then folds itself back to the building body like an aircraft wing of the US air force in Udonthani 1961.