The U.S. Army's M1943 uniform was a combat uniform manufactured in windproof cotton sateen cloth introduced in 1943 to replace a variety of other specialist uniforms and some inadequate garments, like the M1941 Field Jacket. It was used through the remainder of World War II and into the Korean War with modifications before being replaced by the OG-107 uniform beginning in 1952. Pre-1943 By 1941, soldiers wore an olive drab shade no. 33 wool flannel shirt and wool serge trousers in winter and a cotton khaki shirt and trousers in summer, both worn with ankle-length russet leather service shoes and light olive drab canvas leggings. The winter uniform was often worn with the light olive drab shade no. 3 cotton M1941 Field Jacket. A two-piece light sage green herringbone twill (HBT) utility uniform, which replaced a previous blue denim one, also saw use in combat, especially in tropical environments where the wool uniforms were too heavy. Armored units still used wool riding breeches and wore high-lacing boots in some cases, and paratroopers were forced to use a general-issue HBT coverall with no real suitable footwear. As a result of this lack of proper and suitable clothing, the armored units were issued general infantry uniforms, although by 1942 winter coveralls and winter "tanker" jacket had been produced with them in mind. These articles of clothing were made of light green cotton lined with wool kersey. Paratroopers also received their own unique uniform in 1942, the M-1942 Paratrooper uniform. It was constructed of light green cotton twill, with four front pockets and two pant-leg cargo pockets. They also were issued a new boot design of their own, of similar construction to the infantry shoe, only being mid-shin high and laced all the way up, known as jump boots. There were many issues with these uniforms. The combat wool, khaki, and paratrooper trousers all did not have adequate locking stitches in the crotch resulting in frequent tears at that stress point. Paratrooper uniforms also often tore at the knees and elbows; they were often reinforced with canvas patches added by soldiers. The infantry uniform was lacking in functionality compared to the paratrooper uniform, and the tanker winter uniforms were sought after by almost every branch in the Army, making supply and production often difficult. Generally, these uniforms were seen as inadequate, and the Army sought to standardize a better uniform. Initial design The