 What are the rules for wearing backpacks in uniform? According to Navy uniform regulations, backpacks, computer bags and briefcases can be worn or carried while working and service uniforms. However, they can only be carried in a left hand in dress uniforms. Any bag worn in uniform must conceal its contents and have no decorations attached or hung on the bag or briefcase. In service uniform, only black or navy blue colored items are allowed. In the Navy working uniform, bags may be black or matching type 3 pattern only. Computer bags and briefcases with only one strap may be worn across the left shoulder of service and working uniforms to allow for saluting. However, the strap must be worn across the shoulder so it is hanging on the same side of the body never worn across the body diagonally. Learn more about official Navy uniform regulations at mynavyhr.navy.mil