It has a pouch where you can put the battery for your night vision goggles, or you could put weights into it to balance your helmet (recommended).
These lower the volume of gunshots and explosions while making regular voice volume audible. With a few common tools, these can be installed onto your helmet with the extra ARC rail adapters.
Make sure your helmet has the pre-installed rails to accept the earmuffs and ARC rail adapters!
These allow you to mount your noise canceling earmuffs to your helmet. Your helmet needs a rail system for this!
Learn which night or thermal vision is the best for your situation.
