Army - ARMY - SFC - Retired V1 Long Sleeve100% 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 (SFC) is a military rank in some militaries and other uniformed organizations around the world, typically that of a senior non commissioned officer.