Explosive collar

The explosive collar is a piece of headwear in Fallout: New Vegas.

Characteristics
The collar weighs five pounds and provides a damage threshold of 1. If the Courier wanders outside of Hidden Valley with the collar on, it will detonate and instantly kill them.

Locations
The Brotherhood of Steel in Hidden Valley will force the Courier to equip one when they first meet as a way to make sure the Courier does not reveal their location to the enemy (unless the Courier is accompanied by Veronica Santangelo). Mrs. Weathers and her two children, Kenny and Sammy in Cottonwood Cove are also equipped with them.

Bugs

 * When the collar is equipped during Still In The Dark, the Jury Rigging perk can be used with the Explosive Collar to fully repair any amount of headgear without removing the collar.