shoulder strap

WordReference Random House Unabridged Dictionary of American English © 2025

shoul′der strap′, 

1. Clothing a strap worn over the shoulder, as to support a garment.
2. Military See shoulder loop. 
• 1680–90

Collins Concise English Dictionary © HarperCollins Publishers::

shoulder strap noun

1. a strap over one or both of the shoulders, as to hold up a garment or to support a bag, etc