Kanzu

A kanzu is a white or cream coloured robe worn by men in the African Great Lakes region. It is referred to as a tunic in English, and as the Thawb in Arab countries. The kanzu is an ankle or floor length garment. It serves as the national costume of Tanzania as well as the Comoros, where it is called/pronounced 'Kandu' as well as thawb. The robe is also worn in some coastal Muslim regions of Tanzania and Kenya. The men of Buganda in Uganda consider it their most important dress. Kanzu is a Ganda word of Swahili origin, which means "robe" or "tunic". In Tanzania, the term is used interchangeably with kaftan.

The Kiganda/Ugandan kanzu was introduced to the Buganda Kingdom by Arab traders. Kabaka Ssuuna was the first Kabaka of Buganda to wear the kanzu. After the Kabaka adopted the attire it became the formal wear of all Baganda men. The kanzu spread from the Baganda people to other ethnicities and is a national costume of Baganda men. (The Republic of Uganda has no national costume for men).

It is a variation of the Arabic thobe. Originally, the kanzu was made from barkcloth. Today the kanzu is made from silk, cotton, poplin, or linen. Linen kanzus are the most expensive. The main difference between the kanzu and the Arabic thobe is the design.

...
Wikipedia