I don't have a problem but I don't blast my music. When I have these on unless someone in my vicinity is loud, I won't hear any outside noise, and they can't hear me until I take them off and leave them open around my neck.

I will say that I am a glasses wearer, and the V-Moda V80 (M80) headphones are GREAT, at first they are a little tight but as the headband stretches and the ear pads mellow out the wear gets very comfortable also one quick twist and you can have a more comfortable fit without worrying about...