futuristic sci fi military helmet with gas mask in atmospheric blue backlight on dark background

battle gas mask war accessory defense apocalypse tactical equipment respirator dystopian military helmet atmospheric costume dark background cyberpunk filter gear silhouette strategy ominous shadows protection combat ready survival preparedness airsoft headgear special forces science fiction uniform design technology moody navy seal mysterious warfare blue backlight security army protective sci fi glow eerie safety soldier illuminated prop futuristic emergency