I traded someone for some tack and I got something unexpected.
I don't have a picture, but I did find it on Tractor Supply's website:
Weaver Leather Nylon Noseband - 5043540 | Tractor Supply Company
It says it's a noseband and it came with some sort of little strap with a clip on both ends. My first thought was that it's some kind of bitless bridle, but I don't know about western tack.