prop_weapon_upgrade_armor_helmet

This entity is not in the FGD by default.
See below for instructions on making it available.

prop_weapon_upgrade_armor_helmet is a point entity available in Counter-Strike: Global Offensive. It's one of many new entities added with the Danger Zone update.

In Danger Zode mode it will visually show helmet and kevlar on the player.

Note:Placing this entity manually in level will work, however it won't have outline glow.