The Navy Working Uniform (NWU) is a series of military uniforms that are currently used by the United States Navy (and some elements of the U.S. Coast Guard) for wear by its members. The NWU is a "working" uniform, which means that it is made to a more durable and utilitarian standard, thus being worn in lieu of more formal uniforms that might get unduly damaged or dirtied in the process of normal military duties.