Sudanese thawb. How do women manage to keep it in place?

[sofiya]

Sudanese traditional female attire is called “thawb”. It is a long wrap-around cloth worn on top of a shirt and skirt/trousers. As for me, it should be hard for women to keep that amount of fabric in place. There aren’t any pins or buttons. You just have to hold it in hands. And how do they manage to do that and to work at the same time?