The Class-B uniforms which were designed by Robert Fletcher, are more casual, with either long or short sleeves. The uniforms are worn daily around the ship. There are three uniform colors in Star Trek: The Motion Picture (white, brown, beige). The shoulder tabs and insignia showing department and rank. A white shirt and grey pants are worn by command level officers, and the lower officers wear beige. Enlisted personnel wear light and dark brown. The insignia worn on the breast match the tabs in color (Red: Engineering and maintenance). The Rank is indicated by stripes, except for the yellow squares worn on the tabs of Chiefs.
The uniform is accompanied by a attached bio-monitor prop. It's made of plastic, the interior is filled with foam and a back panel holds into place a pair of elastic strips with dried glue residue.