The British Army uniform has sixteen categories, ranging from ceremonial uniforms to combat dress to evening wear. No. 8 Dress, the day-to-day uniform, is known as "Personal Clothing System – Combat Uniform" (PCS-CU) and consists of a Multi-Terrain Pattern (MTP) windproof smock, a lightweight jacket and trousers with ancillary items such as thermals and waterproofs. The army has introduced tactical recognition flashes (TRFs); worn on the right arm of a combat uniform, the insignia denotes the wearer's regiment or corps. Working headdress is typically a beret, whose colour indicates its wearer's type of regiment. Beret colours are: ◾Khaki—Foot Guards, Honourable Artillery Company, Princess of Wales's Royal Regiment, Royal Anglian Regiment ◾Light grey—Royal Scots Dragoon Guards, Queen Alexandra's Royal Army Nursing Corps ◾Brown—King's Royal Hussars ◾Black—Royal Tank Regiment ◾Dark (rifle) green—The Rifles, Royal Gurkha Rifles ◾Maroon—Parachute Regiment ◾Beige—Special Air Service ◾Sky blue—Army Air Corps ◾Cypress green—Intelligence Corps ◾Scarlet—Royal Military Police ◾Green—Adjutant General's Corps ◾Navy blue—All other units In addition to working dress, the army has a number of parade uniforms for ceremonial and non-ceremonial occasions. The most-commonly-seen uniforms are No.1 Dress (full ceremonial, seen at formal occasions such as at the changing of the guard at Buckingham Palace) and No.2 Dress (Service Dress), a brown uniform worn for non-ceremonial parades.