Wolf protectors are not as bulky as Silencios (the black shell ones with one mike and volume control), but they are much more expensive than ProEars, Peltor 6's and 7's, etc. Once the electronics go out, you still have the shell and insulation to dampen the sounds, you just don't get the amplification. Most folks I've talked with or heard comments from, who have any of the "lightweight", thin electronic muffs, say that when they are around big guns, or a lot of guns on the firing line, they need to add earplugs to really dampen the sound. My Silencios are great for pistol shooting, I can even shoot rifles fairly easily (no major stock interference), but for the price I paid for them, I could have bought ProEars or Peltors, etc. and had Stereo and a bit lighter weight.
WSmac