|A Gi/Kimono is a traditional wear in many forms of martial sports e.g. judo, karate and Brazilian jiu-jitsu. From films and TV it is typically shown in white, but the gi comes in many different colors e.g. blue and black.|
In Brazilian iu-jitsu a gi is not mandatory. Instead you can choose to fight in slim fit clothes e.g. compression shorts - but if you wants to comply to the traditions of the arts then a Gi is a must.