As the war progressed shortages of material meant alterations had to be made to the field tunic. The M43 saw the removal of all pleats and scalloped flaps from the field tunic, and pockets began to be cut straight rather than with rounded edges. A new design of field trousers was also introduced in 1943, replacing the old World War I style straight legged "Langhosen". New features included tapered ankles (to help fit with new ankle boots and gaiters, which replaced jackboots beginning in 1941/42), reinforced seat, and loops to allow a trouser belt to be used. They were the German soldiers' favourite and most robust trousers, and were produced right up to the end of the war.