Army - SFC wo Txt V1 Classic T ShirtSolid colored t shirts are 100% combed ringspun cotton, however, heathered colors could contain a cotton polyester blend Preshrunk to minimize shrinkage Double needle sleeve and bottom hems. The rank title of sergeant first class (SFC) existed in the Army from 1890 until 1920 when it was eliminated in an army wide simplification of enlisted ranks which had grown into a system containing 128 different rank insignia.