Peltor Protac II Muffs

Electronic muffs, they improve communication and safety.
There is an active volume function in stereo that cuts out all the bad noises but allows you to hear the anbient sounds around you.
The battery life is approx 270 hours and the muffs have an automatic shut off if no function is used within 2 hours.
Although these are not the cheapest electronic muffs on the market, they would have to be one of the best made electronic muffs ever made.