[@6slyboy6]
To weigh in here, I'm gonna agree with [@Zero Hex]. To suggest that there's a future where there's a variety of fairly readily available body implants and enhancements, but not a helmet that could be resistant to an EMP when that technology exists today is, quite frankly, ludicrous.
Now on the other hand you could argue that the implants use the body as a source of power (blood-driven turbines or using the body heat) and are therefor not affected by the EMP.
But in all honesty, that's a stretch. If it's balance you're worried about, don't. The mask is not any more over powered than my own HUD implants, or the Eagle Eye implants.
In summary, the tech makes sense in world, and the balance is fine so I really don't see the problem with the mask.