Dobok is the uniform worn by practitioners of Korean martial arts. Do means "way" and bok means "clothing." The dobok is related to the Japanese keikogi/dōgi, used in Japanese martial arts, such as judo.
The dobok comes in many colours, though white or black are the most common. The dobok may have the reverse in a different colour than the rest of the dobok. They are made in a variety of materials, ranging from traditional cotton to cotton-polyester blends.
The pants and sleevers of the dobok are wider and longer than the traditional Japanese keikogi. Due to this, practitioners often wear a dobok modeled after the Korean hanbok. The dobok of World Taekwondo Federation-style taekwondo practitioners usually have v-neck jackets, tailored after the design of the hanbok. Traditional taekwondo practitioners may wear dobok that are identical or very similar to keikogi, with a cross-over jacket front, while International Taekwon-Do Federation-style taekwondo practitioners typically wear a newer design with a vertically closing jacket front.
Around the dobok a tti (belt) is worn. The colour of the belt denotes the rank or grade of the wearer. Coloured belts are for geup-holders, while black belts are usually worn by dahn-holders. The order of belt colours may differ from school to school. Most commonly the first belt is a white belt. Other colours are typically yellow, orange, green, blue, red, brown, and then black. Some schools use other colours, such as brown in place of red and red in place of black. Some also have a stripe running down the length of the centre of the tti.