Final answer:
Zoot suits were excluded from WWII L-85 clothing regulations due to their excessive fabric use, leading to the zoot-suit riots.
Step-by-step explanation:
The garments excluded from the L-85 regulations during World War II included the zoot suits, which were popular among many young African American men. The zoot suits required large amounts of cloth to produce, which violated wartime regulations that restricted the use of fabric for civilian garments. These suits became a symbol of defiance against wartime restrictions and were eventually targeted during the zoot-suit riots of 1943. Despite the impact on civilian fashion, the rationing programs were essential for directing materials towards the war effort.