I had a compact with -30dB foams that affected the perfect ear for rifle shooting. In the long (2 years in increments of 1:30) is an annoyance dévelloppe by this lack of space, a compression pain. So I changed to AC !!! It took me to put my old helmet to remember just how badly isolated malgrès its already excellent performance. What he has more: From Space to ears. They do not touch the foam. Space ears bis: it is wide and high. Comfort in mind: although literally touching the hair headband is not annoying (for now: to see in 2 years if that is still the case). I'm not gen either by the pressure of the atria. Silence: it remains only a passing frequency shrill. Nothing in the bass. But let rsonnable. We are still able to follow a conversation almost close properly. Not to be used in single desktop environment. This will not do. As against the silence as my micro accouphènes become noticeable more when I fall asleep in a silent universe. Ideal for shooting the gun ... it means. Ah ah ah. He gets along.