as in the Vietnam War. New Zealand forces also used the U.S PASGT helmet until 2009 after which the Australian Enhanced Combat Helmet became the standard issue helmet until 2019. The current combat helmet is the Viper P4 Advanced Combat Helmet by Revision Military. In the 1990s a universal pattern mess uniform replaced various regimental and corps mess dress uniforms previously worn. The mess uniform is worn by officers and senior NCOs for formal evening occasions. The wide-brimmed khaki slouch hat known as the Mounted Rifles Hat (MRH) with green puggaree replaced the khaki "No 2" British Army peaked cap as service dress headdress for all branches in 1998. From 2002 under a "one beret" policy, berets of all branches of service are now universally rifle-green, with the exceptions only of the tan beret of the New Zealand Special Air Service and the blue beret of the New Zealand Defence Force Military Police. In 2003 a desert DPM pattern, also based on the British pattern was in use with New Zealand peacekeeping forces in Iraq, Afghanistan and Africa. NZ SAS soldiers serving in Afghanistan were issued with Australian-sourced uniforms in Crye MultiCam camouflage. In 2008 the field uniform was updated to the modern ACU style and made in ripstop material. In 2012 the MRH became the standard Army ceremonial headdress with the "lemon squeezer" being retained only for colour parties and other limited categories. NZDPM and NZDDPM were replaced in 2013 by a single camouflage pattern and a new uniform called the New Zealand Multi Terrain Camouflage Uniform (MCU.) The shirt remains in an ACU-style however the pants are based on the Crye G3 combat pant with removable knee pads, usually otherwise associated with Special Forces and Police tactical unit assault uniforms. The MCU, with the addition of a beret or sometimes the Mounted Rifles Hat, was the working uniform for all branches and divisions of the NZ Army, and certain units within the RNZN and RNZAF. After several years in service, modifications to the uniform have since followed with a change in material to Teredo (polyester/cotton twill) for both uniform and boonie hat, a return to covered buttons, and the removal of the elbow and knee pad pockets. In late 2020, due to shortcomings and poor performances of the MCU uniform, the New Zealand Army has begun replacing the MCUs with a new camouflage pattern called NZMTP, based on