Although there is no official national dress, certain features of a traditional dress were adopted and can be seen on both formal and informal occasions. For woman, it is a full-length pha sin, a rectangular piece of cloth worn like a skirt or sarong, mostly made of silk. The pha sin may be of any colour and usually has a contrasting, ornamental border above the hem. It is complemented by a long-sleeved silk blouse. On formal occasions a sash may be worn across the chest from the left shoulder to the right edge of the waist. For men, the traditional dress consists of trousers and a suea phra ratchathan, either a short-sleeved shirt as casual dress or a shirt with long sleeves for formal occasions, both with a stand up collar. On formal occasions, a cummerbund is tied around the waist.