A pair of fabric strips featured on the costume trousers of Starfleet uniforms in Star Trek feature films - they tend to show up on an Officer walking onto a starship bridge and, of course, at Starfleet headquarters in Star Trek IV: The Voyage Home. The items are folded over and stitched sealed; meant to be sewn onto the outside seam of trousers to indicate the wearer to be a member of the special services division. The items are 59 inches long. They retain threads from removal.
A screen-cap is included for reference.