Wore a similar Surefire product in the service. They allow you to hear verbal commands but cut off all noise at a certain decibel. Very good piece of kit.
I've been wearing a surefire ear pro for several years. not the ep10, when I got them, they only had like 2 different versions. but, like I said, been wearing them for several years. like them a lot. I guess the closest version would be the ep4 or ep5.
Haven't used them but always check out hearing protection when discussed. Seems like a lot of noise reduction. Are going to be using for riding or shooting?