lanyard
A rope, cord, or other fastener worn around the neck, wrist or belt and attached to an item that you do not wish to drop or have taken from you (e.g. binoculars, a camera, ID card, weapon or whistle).
Not to be confused with eyewear strap.
For the ornamental cords found on the shoulder part of a military or police uniform, see aiguillette.
See also
Aliases: none