1 dress consists of a dark blue stand collared tunic, matching trousers, and peaked cap, caubeen, or beret depending on the regiment. Female members may wear skirts with tights in place of the trousers. Units are distinguished by badges and the colours of the cap, tunic piping, vertical stripes ("welts") on the trousers, and the colour of the collar for certain cavalry regiments. The Rifles wear a rifle green tunic with black trousers. The Royal Gurkha Rifles wear matching tunics and trousers of rifle green. The Royal Dragoon Guards and the King's Royal Hussars wear dark green and crimson trousers respectively. Cavalry regiments wear shoulder chains in place of shoulder straps, and for officers "overalls" (tight-fitting trousers historically worn by mounted troops). The Royal Regiment of Scotland wears a short jacket called a "doublet", in Archer Green. Prior to amalgamation, Highland regiments wore the doublet with the kilt and sporran while Lowland regiments wore trews, both in the individual regiment's tartan. In the full ceremonial order of No. 1 Dress, officers wear a waist sash of crimson silk and twisted cord epaulettes; while general officers wear a waist sash of gold and crimson stripes. Light cavalry regiments wear a lace crossbelt in place of the sash, while Rifle regiments wear a polished black leather crossbelt, as do the Special Air Service and Royal Army Chaplains Department (who have a unique pattern of tunic that features an open step collar instead of a stand collar. Other ranks wear a white, buff, or black leather belt with a regimental pattern locket, with a bayonet frog if carrying arms. The peaked forage cap is worn by most regiments exceptions being: Beret: Royal Tank Regiment, 4/73 (Sphinx) Special Observation Post Battery RA Royal Regiment of Fusiliers other ranks of the Royal Welsh, Parachute Regiment, Special Air Service Intelligence Corps. Staff Sergeants and ranks below of the Royal Logistic Corps Army Air Corps, Qualified personnel serving with a unit forming part of air assault, or commando formations or with Army Aviation Units. Glengarry Royal Regiment of Scotland Caubeen Royal Irish Regiment, Kilmarnock cap Royal Gurkha Rifles. The above headdress is also worn as part of Numbers 3, 10 and 11 dress (and with Number 2 and 6 dress on formal parades). No.2: Service dress (temperate parade uniform) Originally issued as a field uniform, this uniform is worn for most formal duties by all units. No.2