Not long ago, mentions of helmets in Warzone were found in the game files.
Dataminers report that Warzone may introduce helmets that reduce headshot damage by levels ranging from 15% to 30% and also provide immunity to the effect of flash grenades, as well as armor of different levels (similar to Apex or PUBG).
We may see them in the game soon.
Characteristics of the new armor in Warzone
Armor
Level 1 Helmet: Reduces headshot damage by 15 points.
Level 2 Helmet: Reduces headshot damage by 30 points.