More than simply a uniform, the Gi is a vital tool that can affect everything in Brazilian Jiu Jitsu from practice, to discipline and the respect of martial art tradition… A Uniform Steeped in Tradition Let’s discuss first things first, shall we? The Gi in Brazilian Jiu Jitsu is the traditional uniform typically worn by its practitioners during training and competition including a jacket, pants and a belt indicating the rank. Its origins can be traced back to ancient martial