US Army HBT Shirt OD NO.3

The US Army HBT Shirt OD NO.3 was a crucial part of the M1941 field uniform, designed as a more comfortable, breathable, and faster-drying alternative to wool and denim uniforms, particularly for warmer climates. Introduced around 1941, it was made of olive drab shade No. 3 (OD3) herringbone twill (HBT) cotton, a sage green color that sometimes faded to a lighter shade. The HBT shirt was worn by many soldiers in all theaters of WWII and was practical for both combat and fatigue duties.