shoulder strap

noun3

1. •
   Each of the two short straps connected to the front and back of a garment (such as a dress) and going over the shoulders.
2. •
   A strap of leather or fabric, supporting a bag or other article when carried.
3. •
   Each of the narrow straps attached to the shoulders of a military tunic, especially the ornamental strap showing the corps and grade of an officer.