The GB Shorts are an essential part of the Gracie Barra NoGi uniform. For No Gi Classes, students must wear a Gracie Barra black board short (or black short) (as well as Gracie Barra Black Rash Guard or Gracie Barra training shirt) The uniform must be clean at all times. A dirty uniform is a sign of disrespect. The uniform must be worn at all times.