Help me find some monitors, preferably In-Ear, with the best sound isolation possible. On top of the In-Ear monitors, I will use the best earmuffs I can find. I have zero experience with In-Ear monitors, but I think they are the best solution for this, right? They don't have to be top class HiFi...

Hi guys, I just found some old headphones that I forgot I had. I bought them back in the early 1990's I think. I hope you can help me identify them and share some specs on them. As you can see from the pictures, they are named "PMB 65". Is PMB simply the manufactor? I seem to remember...