Based on the shoulder boards used by the United States Navy, the United States Army and Air Force developed the shoulder mark, a cloth tube with embroidered or pinned rank insignia. Army officer shoulder marks are colored depending on the branch with which the officer is affiliated. They have an 1/8-inch gold stripe below the embroidered grade insignia (the end far from the collar). In the Air Force, a similar stripe is limited to senior officers (majors and above). Air Force general officers have an additional stripe at the near end. Enlisted and Air Force junior officer shoulder marks lack these distinctions. These are worn on all class B uniform shirts. US Navy officers wear shoulder boards on Summer White and Service Dress White uniforms, and wool overcoats and reefers. "Soft shoulder boards" (shoulder marks) are worn on long sleeve white shirts and on black sweaters worn with Service Khaki or Service Dress Blue uniforms. Coast Guard officers wear Naval style shoulderboards on all class B uniform shirts.