General Purpose Uniform (GPU) is the working uniform of the Royal Australian Air Force. GPU is not intended to serve as tactical battledress and, despite the resemblance of its fabric to digital camouflage, includes relatively high-visibility shades of blue. RAAF commanders have therefore received criticism for its lack of versatility, as well as claims that introduction of the new uniform will be cost neutral. The blue and grey uniform was officially launched in 2014 by Chief of Air Force, Air Marshal Geoff Brown to give air force personnel a unique and easily identifiable appearance.