My last pair of noise cancelling headphones was the Bose QC 19s, and I wore them so often that not only was the pleather earpad disintegrating, but I had zip ties holding together various other broken parts. They were a pair of headphones which seemed amazing to me.
Though the sound isolation, the noise canceling, was never great, it was good enough that I was fine with it. Now fast forward to Christmas 2016 and my father gifted me a pair of QC35s, which is only appropriate since I got the QC 19s from him way back when. I put them on right away and was astonished at how quiet the room was, I didn’t believe it. My dad and family were also impressed.