Constructed from netted gold threads, the style of robe, known as chalong phra ong khrui, is a traditional garment worn by male members of the royal family. Chalong phra ong khrui dates back to the Ayutthaya period when, in addition to being worn by members of the royal court, they were gifted to foreign dignitaries to formalize diplomatic relationships. Prince Wan Waithayakon (1891-1976), a grandson of King Mongkut who once served as President of the United Nations General Assembly (1956-1957), generously gifted this insignia garment to the Smithsonian Institution during his term as Ambassador to the United States (1947-1952). It had been formerly worn by his father Prince Naradhip during Siamese state ceremonies, and later by, Prince Wan himself.
This style of gold robe is inherently fragile due to the delicate netted gold used in its construction, which is susceptible to wear and oxidation. To prepare the robe for transport and display, the loose threads, seams, and embroideries were stabilized by hand-stitching, and a custom padded insert was built to prevent the threads from eroding against themselves. Because of its weight and fragility, the robe had to be exhibited lying nearly flat in order to prevent deterioration at the seams.