After all of 45 mins? I'm still using the zulu 1 flying most days of the week. I have found they work best and are more comfortable without a hat on, no issues from an 8 hour flying day.
What kind of PNR should I expect from these?
Passive noise reduction from them... Bugger all, they are an active noise reduction set. They rely on electronic means to cancel out the sound waves rather than passive sound muffling. You need to keep them powered by 2 AA's for them to cancel noise properly.