In the army airforce catalog it's called: FASTENER - Goggle Head Band, a high carbonsteel spring wire. You'll find the on most elastic band for U.S. goggles and are similar (same) as on the elastic neckstrap on an Irvin jacket.Wasn't quite sure where to ask this but would anyone know what this clip is called.
It's usd on the Irvin jackets also apparently used on some goggles.
View attachment 97719