Description Fore and aft cap made of same fabric and color as uniform with which worn. Optional wear of men's style garrison cap is authorized for women with corresponding uniforms. Women’s style blue garrison cap (concaved style made of 55/45 percent poly/wool) phased out 1 October 2002.. Insignia For cap insignia, see article 4311 for officers, 4321 for chief petty officers, and 4331 for ...