- 100% comfortSoft cotton
- Double-needle stitching throughout
- Coverseamed neck with lay flat collar
- Tag-free neck label
- Shoulder-to-shoulder tape
- Comfortable rib knit cuffs
- Sport Grey is 99% cotton, 1% polyester; Light Steel is 90% cotton, 10% polyester.
Sergeant first class replaced the rank of technical sergeant in 1948. (However, the U.S. Air Force, which separated from the Army in 1947, retained the rank of technical sergeant and the U.S. Marine Corps had the rank of technical sergeant until 1959.)